1) Why frost, fire, storm atronachs dont drop fire, frost, void salts? One of rarest alchemy ingreadients.
2) Why we cant "extract" hearts from daedra corpses but we can find them in many strange containers...
3) and why daedra harts are used for crafting daedric motif instead of being alchemy ingreadient
4) maybe we could have in alchemy skill tree, skills like "daedric extraction" "animal extraction" to obtein ingreadients from daedras(salts, hearts...) , animals (troll fat...)
4) why some (common,rare) fishes are not used as alchemy ingreadients
5) why we cant use soul gems as an enchanting ingreadient, as it was in Morrowind and why we cant capture souls like in morrowind, i want to see name of soul geme and name of creature soul in it "grand soul game - frost troll" , spoiler : Monimarco want to capture Molag Bal's soul in Amulet of Kings (strongest soul gem as he claimd) and become god, why soul games and soul capturing is so trival in ESO?
6)Why we cant have pets that acctualy do something
7)and again - player housing
8) why "end game" = cyrodil ? and all world we explored is meaningless, and we dont care about it

you can add more if u want