I'm not quite sure about the fuss over Ti West, think it highlights the lack of prominent horror directors in recent times. I've seen Cabin Fever 2 (I know execs spoiled it) and it was very lackluster. House of the Devil, although I enjoyed it overall, fell short in the final act after a fantastic build up.
I have nothing against him though and hope he pulls off something great in The Sacrament. I've got The Innkeepers and need to check it out.
Lucky McKee is a recent director whose work I regard highly, The Woman I thought was absolutely fantastic. McKee seems to have something to say like the great directors of old which is missing too often these days.