Now what ive thought about is that next upcoming DLC could have atleast two of my ideas included. one mostly for immersion, the other one is for tactics.
1. Horses, yes there is a mod which allows your companion to ride other horse, but i doubt it can be made to work perfectly, unless the creators of Skyrim will create it themselves.
1.1. When you go into commanding mode, you could give order for him/her to sit on a horse, after what he/she is normally following you, if you command him/her to "walk over there" or do any other action, he/she would get off from a horse and then do the action. (when i first time used command mode i thought i can command follower to sit on my horse, but then i saw my follower trying to kill my horse)
1.2. So the idea is mostly for immersion, not everyone likes to use fast travel, and when they dont, they do what? exactly, they roam by themselves on the map. and it aint really cool to ride a horse when your poor follower is trying to catch you on feet, especially when suddenly some big monster appears and try to eat ya.
2. Now the idea for stealthy person. maybe this isnt much Lore friendly for Elder Scrolls series, if character could buy from alchemist (or craft himself) a bomb, yeah... a bomb with own radius, damage and how long the damage will continue.
2.1. Lets say you craft a bomb from 3 ingredients, they give the bomb result like this: 65 shock damage for 5 seconds, 2m radius. you could put it somewhere so that enemy triggers it, or you could just throw it at them when stealth is not an option.
2.2. When crouching(stealth mode) you can aim at ground, and youll see transparent bomb on the ground, that would mean that youre able to set it up there, if you wont aim on ground and press attack when stealthed, then youll throw it like you would in non-stealth mode. yes, for those bombs you probably need to change codes in game, and probably lots of codes (no idea, im not a modder). but im pretty sure those two improvements for the game would add lots of fun.
3. More things to do on the free time:
3.1. there could be quest in every major city (Solitude, Whiterun, Riften, etc.) like if you ask guard if everythings calm and he says that theres been seen some suspicious bunch of beasts/bandits/forsworn/etc and you can tell him that you can help defend gates or go check that place out. for clearing enemies you get reward. 1 enemy = 20 gold for example, mobs amount is random 3-10, depending who they are (wolves could be 10, bandits 3, etc.)
3.2. thieves minigame, 10% chance to meet thief when you enter city/town or other populated place, after thieve spawn, theres 2(?) game days timeout to have chance to meet other thief(or even same thief if hes alive). when you walk on street and you hear someone shout/scream "THIEF!" you look at that direction and you see some shady man with hood covering hes face running away from another NPC, you have few options, like not doing anything, or killing him and taking all the stuff, and when you got the stuff, you can return it to the owner or keep it to yourself, if owner asks if you have seen his/her item, you can say no, but then your taken item is gonna be triggered as stolen and you cant sell it away to normal trader.
3.3. wounded travelers on the road, you have chance to meet one, for example if some marauder tried to rob him, he resisted, and now hes left there dying, there is chance that hes alone, or chance that there would be some marauders watching him and laughing, or taking hes items(as animation). you have option to kill them and give him potion, and after that he would be able to go "back home". after random amount of days messenger comes to you and gives you message, where you find some random amount of gold and text like "Thank you (Name) for saving my life, i owe you a lot, heres some money for your kindness that you showed to me. Safe travels and good luck."
3.4. caravans, oh yea, those in fallout 3 caravans were good, i was always waiting for them to appear so i could buy some good stuff. but why not for skyrim? a new model of horse (packed with some backpacks), two guards and trader, and voila! they move all over skyrim, no matter what danger there is, they try hard to keep their business running. alchemist traders, weapon traders or other sort of traders. with DLC they could be selling new items, expensive, but rare ones! (alchemist could have 20% chance to be having few bombs in hes shop inventory, weapon trader could have some rare dagger). you could have option in dialogue as "do you have something special for sell?" then he could answer you "no i dont" or "actually yes, ive found this kind of sword near cave entrance". weapon can be powerful or not so powerful, enchanced or not. you can risk paying 500 gold for it, or leave it.
3.4.1. for caravans you could have a quest too, like asking if they need another guard, if they say yes, then youre ready to leave with them, it could work like this, you have to be 20 meters within radius from trader himself to get your cash. the longer you walk with trader, more amount of gold you start collecting. after youve got "tired" or other thing to do, you could tell him that you stop your job there and want collected gold. if you manage to go with him from one town to another, you get a little bonus.
of course my ideas have lots of gold rewards, but if theres something more interesting than always getting gold only. then youre free to tell it here!
4. now someone said something about smoke bombs, yes it could make sneak useless, but if... smoke bomb would be related to alchemy (craftable after getting perk at 60 skill) or bought from alchemist or random trader for lots of cash. and now the solution: smoke bomb wont help you in sneaking, but would make your enemies that stand in the smoke more "blind". they might try to slash with their sword at random direction and move somewhere to get out of the smoke. but whats the point in smoke bomb then? its a good way to get away if youre overrun. smoke bomb can be effective even if youre alone in smoke, because in distance, archers cannot know where exactly in the smoke you are or are you in the smoke anymore. so they dont shoot in your direction but they do try to find you by flanking or running through smoke, theres a chance to hide and activate sneak so you can wait till they leave area.
If i get any more ideas of my own, ill add them here! id appreciate a lot if any bethesda member would comment here and tell me hes/her own opinion!

One more thing: please dont flame/troll and stuff like that.
