I've been trying to hold on, but right now there is an issue where my iPhone no longer shows any music on it. It also doesn't show iTunes Match anymore, nor does it show the 772 songs that I had loaded on the phone. Yesterday it did - I was playing the music I had saved on the phone and could browse my Match library in the cloud - but I had a hard crash last night where I got the blue screen and it shut down...and now there are no songs on the phone, nor can I get Match to show up to it.
The weird thing is that when I plug the phone into the computer, according to iTunes the songs are on the phone.
So even with me sending logs to Apple in an attempt to help out, and living with the battery drain, I'm rolling back to 8.4.
Hopefully Beta 2 is better.