Buds turning purple should have no real impact on your buds. If you were early in flower and your buds started to turn purple, then maybe I'd be concerned about too low of temps or not enough P, but it's not uncommon at all for buds to start purpling at the very end of bloom. But it generally is the purple strains or strains with purple heritage that do this, but even if not I really wouldn't worry about it. If anything, the bag appeal will be cool. And I'm happy your nanner situation didn't worsen! From what I've seen, for the nanners to stop throwing like that, you must've fixed the source of their stress. If they were continued to be stressed as before, they'd probably keep throwing nanners. That bud looks wild though, very beautiful! I hope it smokes as well as it looks!