Well, although I really like some of the new features of RC2-6, I'm going to have to revert back to the released firmware for now. I'm getting too many instances of laptop and phone clients both getting dropped, and I also found that even though I manually set the channels for all bands, one time I found that the 2.4 band and the 5G-1 band either had some nodes (5G-1) or all nodes (2.4G) on the wrong channel (don't know if that is related to the clients being dropped). In addition, it's hard to change settings in the GUI, because in many cases a settings change causes the GUI to crash, requiring a main router reboot, so it takes forever to set up the network the way I want to.
But when the next build is made available I'll consider trying it. The new features are too good not to try.