People should click on the actual article to get a fuller idea of what was said. Iger said he has never used the system (did anyone think he had btw? lol) and deflected over to D'Amaro. As of just a couple months ago, D'Amaro said park reservations are "here to stay". So unless that was a lie, or he changed his mind since then, I don't see much to indicate a possibility that it will go away. As a few people have pointed out, staff reductions were a major reason that park reservations have been maintained as well.
IMO, Iger's response reads to me as the empty "i'll think about it" line parents give their kids to shut them up when they want something they have no chance of actually getting.