Rogues : Some form of Sharpshooter. More content for already existing specs, more action bar slots (seriously who had the idea to make such a tiny actionbar)
Warriors : Dual-wielding one handed swords, Weapon Master or anything. Again, more action bar slots.
Mage : More offensive spells, the return of Fireball, new specs : Blood Mage, Keeper, Arcane Warrior (the real thing not knight enchanter)
I can't stop saying "MORE ACTION BAR SLOTS!!!!one1!!"
Most importantly though, we need more content for whats already there, the trees have been made so simplistic and dull its ridiculously boring after you reach a certain point, it sorely needs more variety, as it is people find a rotation that works and sick with it for 25 levels, in DAO you could play a gazillion different ways due to sheer variety of skills, stats and gear.
And while I'm on the subject of gear, ADD. MORE. GEAR. VARIETY.
The top tier armors look nearly identical, second tiers also, unacceptable. And the "unique" armors look just like other armor models with different colors. I understand Bioware has NEVER been good with armor design, but come on, if you didn't/couldn't add mod support then at least give us enough variety.
Sheesh.. Variety variety variety variety, cant stress this enough.