I just installed Mojave 10.14.2 Beta 4 yesterday. All seems to work well. It is very snappy, no loss in speed which is good. I am anxious to install this on my main Mac. Hopefully, it will fix a few odd things that don’t seem to work quite right. The fixes and improvements were not listed in the Beta, but I am sure there will be some. I will let you know when the final is released.