To echo what you wrote, Steven, I've thought that since Crisis on Infinite Earths (and to some degree before), the vast bulk of DCU stories have always and only been about the DCU--usually, correcting or modifying some kind of continuity issue.
Certainly almost all event books have been about exploring the continuity problems wrought by COIE.
Power Girl has been trying to find out her true history since 1986. Hawkman's is constantly reinvented. Wonder Woman restarts afresh after COIE, and decades are spent retelling JLA stories in which she couldn't have been a member (only to have that all changed back after Infinite Crisis). Various things happen to the eldest JSAers to keep them alive. And of course there are the vast narrative contortions required to resurrect characters like Hal Jordan and Green Arrow.
Not that there haven't been good stories to come from it--there have been many. But the DCU has been navel gazing for over 20 years now, much more so than Marvel. And there are no signs of it slowing down.