all 3 specs need a revamp, almost everything is the same as it was since bc with a few exceptions. Ranged spec? i think rogues should stay melee with some ranged capabilities just like we are today. although what i would really love is making each spec unique, warlock revamp is a great example each spec is totally different than the other. And above all, our spells animation have to get something like poisons spatters or something.
and most of all i'd really like to see us do less passive damage. and pls bring back poison animation on the weapons (the dripping part) i miss it so much