You are absolutely correct, TacT works well with reflected sound as long as phase shift is minimal. That's, BTW, why TacT recommends as close to the wall placement as possible.  There is no way one can get a minimal phase shift with omnis.

with the kind of placement I am bound to now I can not create a pin-point imaging even with direct speakers and TacT, although the way the stage snaps into focus with TacT is quite impressive.   

So the question for me is - shall I fight it or shall I embrace it?  I will let you know about the result anyway.