1: Only. One. Ring. Why? JUST when we can FINALLY dual-wield, or pack a weapon and a spell, why are we restricted to one ring? It makes NO sense and it's annoying as hell.
2: Can't craft circlets. Why? We can craft all the other jewelery.
3: At higher levels, dragon encounters are a bit too common.
4: No unlocking spell for mages. It's a pain that I have to use lockpicking, no matter if I'm a stealthy thief, a Nord warrior, a Breton mage, etc.
5: Bandit Chief > Dragon. Wtf?
6: Why is the path up to High Hrothgar such a chore? You'll likely be walking it at fairly low level, so why is there an ICE TROLL up there?!
7: Not enough game

It'll never be enough. Moooore!
Someone sticky this thread. With luck (more than all of us put together should have any right to see in our lifetimes), Bethesda might listen to one suggestion from this thread for the next patch.