The question is more whether we eventually install a style like the old ones (maybe a new one by the same creator). We won't put the old ones back - they really don't work with the new software - but can certainly install new ones, and it's very easy to do so.
What style did you use? The old ones were called Cloud, Flat Awesome, Flexile, Flexile Dark, Social, xendisConnect and XenPress. Sarah always used Flat Awesome and resisted any attempts of mine to switch her to the default theme - but this update screwed it up so much she didn't complain at all when I switched it over.
Find a new style you like that's compatible with Xenforo 2.2, and once we've sorted out all the other things ahead of that on the list, we'll look at installing it. Unless, by then, you have gotten so used to the current style that you don't see a need to change any more!