I've already put points in perks that reduce my spell cost by 50% so wouldnt another 50% from my enchantments be sufficient? unless there is something i am missing here

I think it's 50% of 50%, so in actuality, it's 75%.

100% reduction means you can cast for 0 cost.......so you can spam out the spells in that school as much and as fast as you like.

Yup, in other words, the 50% from gear/enchanting is factored in AFTER the reduction from perks (it's multiplicative rather than additive). It's how most things work in WoW too. So for example:

Original Base Spell Cost: 100mana
Reduced Base Spell Cost (due to perks, 50%): 50mana

Then character puts on 2 pieces of gear, each with 25% spell cost reduction enchant. I think that part is additive, so you'd take 25+25 = 50% and apply it to the already-reduced cost of 50mana, so that the new spell cost is 25mana.

This is one of the reasons people complain about the magic perk trees -- once you get your enchanting up, it makes half the perks (the ones that reduce the cost of each spell level by x%) pointless.

Bethesda is less intrested in moving foreward, than in pleasing the mainstream. A broad segment of the rpg gaming fans find magic "too easy", and want there to be some kind of "twitch" game combat system. I guess they feel that having to move more keys in coordinated, timed patterns to kill something is more stimulating, than hitting one button to cast a spell.

I disagree, but I'm 45 and it seems I'm aging away from the mainstream gamers. The concept of me, casting a spell at a creature is all the stimulation I need to have fun, within the context of the story's action. Kids today want to have to do more stuff to get less done, so they can feel they're good at it. So magic is being slowly replaced by crafting and melee/ranged combat.

Or it seems like that to me. But i've been wrong many times when trying to anolyze a general populations motives and feelings, so hell, I dunno.

Not too different from other skill trees though.

I wanted to make and improve Plate armour, but I had to take a perk to make and improve Elven armour, which I have never and will never use.

I think the system for appluying bonuses, the fact that so many perks are just + % to such and such, and the way magic is handled in general is lazy and unimaginative. I still enjoy Skyrim but I really want to like the magic more.