It took them forever to get the 322 to work, I don't think they'll be charging into replacing or seriously revising it.
Did they? they went through a few linkage based designs, before stamping a hole in the DT and making something that looked like a 224 with a hole in the DT.
Change for 650B would just be a slight tweak to the geometry of the frame and swingarm (assuming there's clearance under the saddle).
thought wider wheels was for less/more* dish so stronger, or have I not been reading the marketing properly?
*can't remember the specifics of "dish"
165mm was dishless (actualy they weren't, the flanges were wider, but the wheels were still dished), 150mm was a comprimise. Neither really wored out though as the chainstays got so wide you couldnt fit a chain device or your feet caught the swingarm every time you pedaled.