Well if you already have a habit of manually doing it, seems good. You could always just block frames by default and manually block scripts when needed/you'd otherwise do it and unblock frames the few times it fucks up a site.
Didn't even know that, but as long as it's a clear part of the product, so you can steer clear if you need, idm. Personally I prefer separation with these things, makes it easier to dose correctly for yourself.