In agreement with this, with all the things you have to keep track of with sniper (LOS, Positioning, Energy, Rotation, Cooldowns etc...) to actually compete playing a Sorc or BH is brain dead easy in comparison.
Operative is also in the same boat, they take quite a bit of skill to execute and perform well and really don't even need that 3s knockdown that's the main gripe of the class. At at least with them if your chasing down your target your getting backstabs off and we are left using either autoshot or draining/wasting our energy with hammershot
I usually don't even bother chasing them since if I run into one of their buddies I'll get roflstomped right quick.