Well, look at how "complex" the Batman series is, we've got Batman, three different versions/stages of a Robin, Batwoman, Batgirl and with Batman, Inc. we add even more. It's a mess.
A complete reboot would boil that all down to bare essentials. Batman and Robin and potentially a Batgirl.
Hell, I'd really argue you don't even need
a Robin so make it a tad more practical (and sensible) with him being a teenager and when he gets into his twenties after a few years of comics he goes off to his own comic series and Batman rides it out solo from there.