pre-Crisis Batman was tormented but balanced. But afterward, the examination and critique Miller brought to the fore in DKR was obviously what the fans wanted, so DC, never one to miss a buck, obliged. But having deconstructed and debased that Batman, what do you do then? Eventually he crosses the line from tragic to pathetic. So what Morrison did with him, for all its missteps, was necessary, even if it's not necessarily the end one might have liked to see.
Except that, as you noted in your first paragraph, this "end" is only temporary. Bruce Wayne will return as Batman. So the question remains, when he does return will his writers (and editors) portray him as noble and balanced rather than brooding, assholish and pathetic? That's what we were promised after Infinite Crisis ("I won't be going alone"), and look how consistently that played out. Can DC collectively allow the returned Bruce Wayne to be--despite the lingering memory of his parents' death--stable and trusting? If not, if he's going to be all "I must spy on everyone and snap and growl at my Bat-family and develop detailed plans to kill my allies on the miniscule chance they'll go bad"...well, then DC may as well just leave him in that prehistoric cave forever.