Just because you may have overkill, what do you gain with changing the stuff out? Saving some space? Can you stack all of your equipment vertically, so as to take no more of a footprint than you would with one receiver?
What's another nice thing about separates is that it gives you the most flexibility with introducing EQ, bass mgmt, stuff like that. Hey, maybe one day you'll do a 2.1 or 2.2 system, maybe even make your own, or if you get an active setup you would need separate amp channels for instance.
But I understand wanting a more streamlined look and/or usage. If the amps are triggered, then you may not even get more streamlined usage anyhow I suppose.