I mostly liked Skyrim. But it requires you to be dedicated to a single game style. Why not be able to burn enemies with magic, run a lot against your enemies and crush their skulls with your two-handed axe, then take out your dagger and stab your enemy's throat? When we focus on health, we can't run more than 6 seconds without stamina boosting items. And when we focus on magicka, the enemies rip our throats with two slices.
Maybe you should remove the general leveling. The skill levels and perks should come by themselves and our stamina should rise by running and with power attacks, health should increase by getting hit (Light/Heavy Armor style) and magicka should obviously by casting spells. The carry capacity should increase over time, just like we grow muscles, Sneak skill should be Stealth skill, not limiting us with crouching behind our enemies and hope we kill them with an instant hit, we would like to be able to hide behind a wall or an object then wait for our prey just like we do in Assassin's Creed.
We all like to multitask, creating the ultimate player Yet we don't have enough skill points for it, the game should do it for us instead. Speaking about items, it should be categorized with more details by not making us search for the specific item all the way down the long list, maybe also a search bar would help.