I do hope it arrives soon.
unfortunately, I think it is more than Safari, as we get the crash to tablettop in several apps. One can run our years old ipad 2 and the air beside one another, in the same apps, doing the same thing, albeit slower on the 2, and watch the air stumble and fall when the 2 doesn't. Both on same OS revision. It is disappointing. That said a click and you are back, and I much prefer the air screen.
I'm pretty sure it will sort your crashes. Each beta release has addressed 'stability issues' in the release notes and I can't recall any recent general (non safari) crashes to desktop whereas the 7.0.x general release was quite crash happy.