My suggestions...
1.Challenge me. Anyone disappointed with the enemies? they all do the same thing: Charge at you with weapon drawn and attack. this is, of course fine for the bandits and warriors, but its ridiculous when the mages fire off one spell that couldn't light a cigarette and try to break through my steel armor with a dagger. They should be trying to incinerate/freeze/electrocute/disintegrate/poison or paralyze me, not poking my platemail with a weapon equivalent in power to a rusty tuna can lid.
2. Better setting: Cyrodil is boring and cliche. Morrowind had an exotic flair to it, It actually felt like exploring an alien world with strange creatures and customs. Oblivion is a like a bad dream i had once. everything was shiny, happy and colorful. Its like i stepped into children's book. Get rid of it. If people complain, too bad. If you want shiny fairy tale garbage, Go play fable and hammer daggers for awhile.
3.Better main quest. Oblivion's wasn't so much bad as it was vastly inferior to morrowind's. Bring back the moral ambiguity and complexity that we had with the tribunal/nerevar/Dagoth bit. All the goody two shoes in oblivion made me wish i could join the mythic dawn.
4. Bring back the cast on use enchantments and the enchant skill along with it. part of the awesome fun of morrowind was my vast inventory of magical weapons. I had dozens of rings and amulets and never needed to swing a weapon in morrowind. Also get rid the recommendation garbage for the mages guild. Its stupid.
LEVITATION- stop whining and bring it back. I have heard all the excuses. they're lame and only an idiot would believe them. The real reason was that oblvion was rushed through development before the work was done. END OF STORY. And if you can do it the old way do it a new way. Figure it out. Would it be so hard to just put this sentence in the manual: "Don't try to levitate into towns, it won't work." simple.
WEAPONS- I don't care if anyone else used the throwing weapons,crossbows,spears,ect. I DID. and so did a lot of other people and those people me included, were quite PO'd to not see them there.
The two above relate directly to rushing the game into stores before its finished. People say to me: "ITS NOT THEIR FAULT ITS THE INVESTORS YOU MEANIE!" Then how about showing some self respect? if investors complain about the game not being ready for a deadline tell them too bad. Tell them to grow up and buy the medium size whirlpool or something. what are they going to do? pull their money? Their loss. Let someone with a sense of maturity and a grasp of reality make millions of dollars of your product. You guys do the work, you OWN them. Let them squeal like pigs. Not like they'll do anything but threaten you anyway they're cowards.
I agree with everything said, I just would have said it with slightly less obvious disdain for TESIV.
1. All sorts of enemies should have different battle strategies and provide different challenges, as well as have a variety of attacks. Wolves should travel in groups, and circle you and attack from behind, as well as being able to charge and push you to stagger you, and bite you to damage you. Mages should have more than one spell up their sleeve, and have more than just destruction spells. Any flying enemies should swoop and dive, rather than just hover above you.
LEVITATION. It does seem that the closed towns thing is sort of like a convenient excuse. Levitation in many areas could have been far too useful, and the AI was still too stupid to know what to do if you could levitate. More time needs to be spent on level design and AI anyway, so as you are fixing these already existant issues, fix the levitation related problems with those things as well. And to prevent levitating into towns, I'd be okay with a stupid and shallow excuse (such as some sorcerer or god or something placed an enchantment around towns to prevent levitation) if it means we can levitate again.
WEAPONS. Of course bring back throwing weapons, but they don't have to be useless this time. With an in-depth locational damage and armor system, they could cripple limbs and do quite a bit of damage, but if it hits an armored area, it does little damage. Also having limited throwing distance could help keep something like this balanced.