I think there's an element of respect, as well. With the other folks you mention, however impressive they might have been portrayed as on their own, they were still very conscious of stepping into something significantly bigger than themselves. With Jason and Damian, however, the default attitude of those characters has been, "Pfft. This is lame, and everything that came before me was lame," which is not at all hard to interpret as a Writer On Board position, and any time any writer takes that tactic, I reject whatever they're trying to sell me INSTANTLY (the same reason I will never see any merits whatsoever in Morlun as a Spider-Man villain, for that same OH NOES HE MAKES EVERYONE ELSE I'VE FACED SEEM LAME BY COMPARISON bullshit). But then, I'm of the opinion that Writer's Fiats of that nature are pretty much the single worst thing that any storyteller can do, so ...