Also, does the 568.2mm allow you to run the mains as active while you run the center to a separate amp and passive speakers, or, vice-versa?
Yes. Have a play with the legacy configuration utility - you'll see that the speaker layout is very flexible. The only thing to be aware of with the configuration utility and the 568.2MM
running the v2.5 "beta" software is that the frame delay feature was removed from the v2.5 software, but not the configuration tool.
Incidentally, you will almost certainly want to be running the v2.5 software on a 568.2MM - it really isn't beta.