For the record, Robin was initially created for precisely the same reason that the Crisis was - to bring new readers into the fold. (For very different reasons, I'll grant you.) Kane and Finger thought that Batman as a brooding loner was getting too difficult to write - this was the age of spoken exposition, after all, and Batman needed someone to talk to, someone the readers could relate to. So they created Robin - and it worked! (I'm sorry, I'm sure you already know this, but I just wanted to make a point.) As for the current situation - I think the main problem is not so much that writers are bringing in elements of the past (although I personally would prefer to see more Golden Age elements rather than Silver), the problem is that it's not being coordinated properly. The two eras are very different, and time should be taken to integrate each transplant carefully into the modern era, to make it work properly, before bringing in the next one. Therefore, when the next one came in, readers would have accepted the previous transplant as a part of the modern universe, and the next one would seem to flow organically from THAT, instead of just being yanked directly from the past. Unfortunately, what they're ACTUALLY doing is just flinging them about higgledy-piggledy, with one writer saying 'oh, if he can do that, then I can do this', and another saying 'oooh, if those guys can do that, then there's nothing stopping me doing this', except the editor, of course, but he doesn't, and they all keep piling up on top of one another, and it's all a big mess. My guess is that, in ten years or so, things will have settled down a bit and order will reign again, but in the meantime, it's a bit chaotic.