Do T'au really suck in-game?

The amount of complaints I see that spotters only fix the 4+ nerf when T'au should already be good at shooting - and the effort to align everything, points spent on spotters, using shooters as spotters in-turn which nerfs them as shooters... Couple that with the lack of any meaningful T'au (not Aux) melee. I've kinda come to the conclusion that the best thing do do with T'au is to use a couple of Hammerheads as fire support in KHP.