Well, the screen fatigue is from the icon browswer redesign. And crosspost settings are from the other beta feature, which is the new update page they've been working on for months. I don't really know about the Firefox crashes - cache-clearing is an unfortunate side effect of moving from old code to new. If your browser still has the old code saved in it's cache, it has to be cleared for the new to work properly. Usually it does it automatically, but sometimes it doesn't update properly, and clearing it should be a one-time only deal if necessary.

So yes, these wouldn't be problems if stuff stayed the same - but we'd have other problems in the form of outdated code or code that isn't easy to work with (and the old icon-browser has problems with it's design, which is why it's being updated).