Ability bloat is general problem of SWTOR.
Each class/discipline I know have so many skills which you should have good access to that you run out of buttons.
I use every button around WSAD, 3rd and 4th mouse button and I still have 2-3 abilities which I could benefit from in certain encounters but I just dont have keys for them and clicking skill plate sucks.
Players are rarely happy when skill is taken and not replaced by something else but seriously...
Base SWTOR probably had reasonable amount of active abilities but expansions were only adding or replacing them never removing skills and so we have more tools than we can put on keyboard.