I come from WoW, a game where in PvP, (almost) everything is viable up to high rating, and even there, most things are still very viable if played properly.
I know that SWTOR's ladder works differently, and there's a "ranked solo queue", which doesn't exist in WoW. I assume this makes things different.
With that in mind, how important is playing a meta class in SWTOR? Can off meta picks still be played in ranked if used effectively, or is there just no point in playing anything outside whatever's fotm?