Here are a few ideas I think would help our class, and overall class balance.
1. Slows need to be more normalized, they should slow for roughly the same percentage and have roughly the same amount of uptime (ie. marauders do not need a 12 sec slow with no CD for 2 rage, basically perma-slow)
2. Why on earth we are the only class with a single buff (tracer lock) that can do one of two effects is beyond me, other classes just get a brand new proc, they don't have to choose between dmg and healing.
3. Rocket punch is not (I.M.O.) a mercenary ability, give it to powertechs and replace those talents with useful stuff like a short-ranged root/slow or both (obviously if we get this we wouldn't need a slow on unload anymore).
4. Rocket boost could have a second or three shaved from its CD, if it provided a short (2 sec) immunity to leaps, pulls, etc. that would be great.
5. "cast" abilities have an increbile weakness in terms of PVP play which causes lots of balancing issues. When you rely on cast abilites and you are constantly interuppted through the various stuns knockbacks and interrupts in the game you can get completely shut down with little to no skill. It isnt fun at all, especially when 99% of melee stuff thrown at you is not interruptable. I would remove interrupts from the game (pvpers can still use their stuns knockbacks etc for interrupts) and move abilities towards instant abilites with short CDs. You can still leave a few channeled abilities. Anytime I come across a commando/merc type elite in PVE I laugh the whole fight cause half their damage fizzles out against my interrupts, they are cakewalks. Ive tried multiple classes in this game and the most fun ive yet had as a dps is my madness sorc because I love being ranged and I hate being interrputed all the time (all I really worry about with him is his channeled lightning).
6. Obviously if #5 is implemented (which I doubt, but hey I can dream) ability damage would have to be tweaked again to get it back in line, as would some boss encounters but I feel the result would be worth it.