Skaal and Bosmer have connections with forces of nature (we could call it that) and Kyne gives some abilities as well from time to time (Holy Crusader was not attacked by the nature's inhabitants and there are two Th0um's in Skrim that affect Kyne's element).

I agree that it should not be a magic school, but it is not like it can't be represented as a special ability (like Shouts are now). Hell, Th'um is a special divine blessing... which by the way is also given to humans by Kyne.

Play a wood elf or khajit.....command animal and nighteye.

On the guilds after the septim dynasty collapsed the guild charters would have expired as a charter by it's nature is a contract with the government.

Mysticism wasn't really a school but more a collection of spells that were not that well understood so they were classified as mystical. Mysticism was always considered a special school.
However, many such spells are lost to history or disabled by Akatosh knows which means (like teleportation) while some seem to have been researched and classified into other schools.

Natural spell is nothing man... with the dragon introduced in Skrim, one would think TES should evolve to dragon ball universe.

I agree those would be a cool addition but you can't get mad at them for not adding every single thing that everybody wants. You can be disappointed at the lack of spell variety but I don't think you can flip out for not including a specific thing that wasn't even in high demand and hasn't been in past games. Also there is the animal allegiance shout and wood elves get command animal, but I agree those spells would be interesting and fun

You know Skyrimsfang, there is something called using your imagination,
As someone have said Storm atronach can be a rock golem etc.
It's not a big deal, I could understand if it was something that had been in a previous game, but it isn't.

you answered your own question

Gaps in the lore don't justify adding more gaps in the lore.

oh so they can remove things from lore, but cant add things to lore which would be beneficial???

Why is summoning a vine more beneficial?
I'd rather have them add some of the old spells (levitation, some summoning spells etc.) and weapons (crossbows, flails, spears etc.) As those already exist in the lore.

I think this is the only thing that needs to be said about this.

Well considering the length of time that the Elder Scrolls series encompasses and that over all this time they still use essentially the same spells, the same types of weapons etc, then yes there's no room for spells to evolve in the way you suggest.

You'd think logically that any group of sentient beings around for thousands of years would eventually figure out better ways to kill each other rather than using the same old methods over and over, but that just isn't the case with this series.

Again, so do Druid-like abilities. Skaal used them and Bosmer are also surrounded with nature elements. Not exactly how the OP envisions it, but it is not that far from it either.

Old spells and weapons are old features, not part of the former lore.

Well if you happen to be in a city, there wouldn't be too much vines around.

Again you are pulling out one example, but roots and nature magic would be very beneficial and fun. Vines can entangle foes...

True, but as you said, not the way he envisions it.

True, but the invention of the crossbow, must be part of lore or TES history somewhere.

They could add all kinds of things to the lore if they felt like it.

The Elder Scrolls universe has established a particular feel and style, and druids/shamans (in the WoW sense) don't fit. You can rage about it all day, but they've never had a school of Nature magic, and I don't see them changing that (since it basically boils down to one effect- summoning vines).

The feeling I got with Skyrim was that the Devs were trying to differentiate each spell from one another. They wanted to ensure that no two spells essentially had the same use. Vines coming out of the earth and stalling people for a bit would be entertaining, but its basically the same as paralyze or even Fus. quick stumble, then they regain and charge at you again. RP a druid only using the Kyne's Mercy shout (not sure if that's the real name, can't remember it right now) and try to be more nature-y.

You completely missed my point. They shouldn't have removed things from lore. That was a bad idea and a mistake on their part. So using that as proof that you can change lore doesn't work.

This is a general explanation of how I feel after reading this... http://www.youtube.com/watch?v=ZpmIBJ_MKas
Magic (I could be wrong) is not something that can be created in that; No-one just woke up one morning and said "I'm going to invent a way to summon the dead from Oblivion". It has always been there. For a whole new school of it to appear would not only fail to make sense, but almost would feel tacked on. You cannot just go in a say "Every mage ever is dumb because, even after studying magic their whole lives, they didn't know about this one school that lets your controll trees" And do you really thing Kynareth would let some mortal jerk controll nature (you know, HIS domain)?

dude... you need to chill. if you are a dude and not a kid who is under aged to play this game. It's not going to happen i'm sor-no i'm not. it's a dumb idea. i'd love to see a vine sprout from a mountain... right now every one is either raging at this dumb idea or laughing at you. just saying.

You could create "new" spells in oblivion by mixing old spells together (but besides that point). Things tend to evolve over time. Who's to say that a few mages didn't go out to research and try to create a new type or class of spells. Just because things now that are effective doesn't mean they shouldn't try to keep learning and improving. Stagnation is bad.

You know, I am pretty sure a lot of people would laugh if someone (years ago) came and said that player should be able to do cool, magical stuff just by yelling.

Either way, "cool down" can be targeted to more than one person here. OP did start a potentially good discussion as having abilities to control some elements of nature (thanks to Kyne or Y'ffre or the Hist) is neither far-fetched, not anti-lore and can be more constructively discussed. Just because the OP could have used better wording is not a reason to bash it THIS much.

I suppose one could argue that the Telvanni dunmer do (or did) use plant based magic, looking at their towers in Morrowind and that there is an in-game precedent for "nature" spells. Come to think of it, in the Bloodmoon expansion you could learn Wolf- and Bear- summoning. The ranger/druid/shaman/ashlander wise woman/witch style of flinger could be considered canonical.

Of course, the obvious answer is, "If you want it, build it."