For me, I know I'm a little upset about these:
-No dragonbone weapons
-cannot upgrade silver weapons(but we have silver ingots)
-Cannot be a vigilant of stendarr
-lack of varying armor/weapon types
-arrow crafting
-unique weapons
-unique armor
-lack of genuine dialogue
-lack of people in cities(I feel like whiterun needs more random people since it is the place to go to buy and trade, like mentioned in game)
-cannot craft circlets
-cannot craft staffs
-cannot create unique magic abilities
Just a handful of things I was wondering on. I can give more details if need be, but my main idea of the post is to figure out what else people thought was lacking in the game. I'm hoping to get enough recognition for some of the more popular things so we can hopefully see them as patches or dlc in the future.