If I'm doing it worng, that suggests there's something very wrong with the game mechanics. There should never be a predfined set way to play in an mmo like this, there's even less excuse when the player is bombarded with so many skills.
The other day, I was learning to tank by queueing up for some HMs, and there was a Shadow using a single-bladed saber not using any melee attacks basically using only Project and TK Throw.
There most certainly is a way to do it wrong.
I wouldn't mind seeing Infiltration get some DPS love, mainly because of how incredibly difficult Balance is to play. I put in much more work to play and put up less numbers than the Watchman Sentinels; very unrewarding.