Pointless, as I'm sure everything I say has been said and Bethesda will not heed any suggestions. These things can all be modded in, but should be there in "vanilla"
1. MAKE THE GAME FOR PC FIRST. Release for console also, but please for the love of GOD make the game on PC and port to console AFTER, not the other way around. Oblivion runs like absolute garbage on PCs that more than double the suggested specs. The Elder Scrolls in general is great, and there would be nothing without Bethesda, but the game really is infinitely better with mods and that is only available on PC. THANKS.
2. No level scaling PERIOD.
3. More lore-based creature diversity, get those Dreugh (non land), Werewolves, etc. back in here. More creatures in the water? make us fear going swimming again.
4. No fast travel, bring back transportation systems for pay? maybe even have it animate your travel but be very much faster than walking or be able to be interrupted by bandits
5. Realistic encumbrance/fatigue? can't carry everything, get tired running, etc.
6. The world should look like an alien world, not like the Canadian wilderness. As beautiful as OB is? Cyrodiil does not look like a world in another galaxy/dimension?
7. Something NON-classic? varied body types for npcs. Big, small, fat, ugly? no more beggars with arms 2 feet in diameter and rock hard abs.
8. For when people DO mod the game later, have those varied body types modeled with the most recent developments in 3d modeling including morphers so that you can have multiple body types wear the same clothes. Have separate male/female items for EVERY equipment slot including bracers, shoes, etc.
9. Eliminate the attribute and skill caps.
10. Use the uncapped attributes and skills to adjust races, birthsigns, and max effectiveness of things to make each character play vastly different than the next? in OB by the time you are level 50, it doesn't matter what you picked anymore? should be that way.
11. Redo lock picking to require skill levels, no more impossible to pick locks requiring keys, and put traps back in.
I could go on and on, but why.