Well bit the bullet and went back to 7.1.1 and it seems SO stable and fast after this beta. Makes you appreciate released firmware. 🙂 Hoping B3 brings with it some more stability. Typically I am ok with the betas but this one was really not ready for primetime. More like an Alpha. But I am looking forward to iOS8, other than the changes they made to photos. That was a mess and never could find all my pics other that that "years,moments,collections" options. Sure is nice to just hit albums and Camera roll and bam there are all your pics to scroll through if you want. Hope they improve on that before release.
Other small issues were with contacts app, and random lag and lockups. Lock screen not unlock sometimes. Press power during a call disconnects call sometimes. Mail notification silent sometimes (may work after a reboot for a few emails). Video playback in Safari severe lag playing and with control such as pause and play. Most of these things will most certainly be addressed as it gets optimized and closer to release. Definitely looking forward to what the next betas bring to the table. And hope they dont kill camera roll !!