I've had a good experience with 5.6a so far, but, I have an RX 6800 and want the latest drivers for gaming.
As far as I can tell, this release is focused on support for the newest cards and drivers, the driver no longer crashes like clockwork and the newest opencl kernels work.
Hopefully we'll get some new features coming through in the near future, but it seems less likely than ever since I'm sure phoenix took a big hit from the Nicehash attack.