Legit and Chozen Cancelled
Legit made it two seasons and Chozen only made it to one before getting cancelled by FX. Stuck on FXx, they undoubtedly suffered ratings wise, but, supposedly there are more original series on the way at FX and FXx.
Also note that, Louie, which is still a sitcom, albeit an experimental one, is on FX, which is supposed to be a dramatically bent channel and not FXx, which is intended for comedy only. Ruminate on that while you also ponder how much longer will FXx go through growing pains.