We just updated to the latest version of XenForo and v2.2 included a lot of updates so a few things might look off at the moment. We're working through them and please let us know if you spot something. Thanks!
It depends on your prefered camera angle, the stadium and your swivel setting. In case you usually tend to use normal angle and no swivel, you should notice no slowdowns. But if you prefer using the wide cam and swivel set to any value between 2 and 9, you're gonna get some slowdowns.