The Blade Runner/Clockwork Orange comparison was in purely visual terms, not in terms of story depth. And is Blade Runner a particularly clever film anyway? I always just thought it was a bit pompous and arty but ultimately quite shallow.
As for having a subtext, I'm hoping Dredd will have a similar level to something like District 9, it's there, and provides a little meat on the bones, but it's hardly a deep or particularly insightful treatise on the human condition.
As for exploring the rights and wrongs of the society Dredd presents - that seems to be what we'll get in the proposed sequel.