The public release was the same revision I got a chance to use ahead of time.
My suggestion if you do try it out, set your STB to a fixed resolution rather than letting it match the source content resolution. Most of the users having issues seem to not have that set.
I’ve got the weak signal a few more times but it is is very usable for a beta. I did lower the threshold for the weak signal message but really haven’t tested enough to say without a doubt that it helped.