Oops, the Amazon Appstore issue I reported was my fault, I had signed in with the wrong Amazon account. The apps work fine now.
And yeah, I'm not doing a factory reset, I really don't see the point. I don't have any issues and the phone is running great.
BTW if you're seeing battery drain, check your connection settings, they probably switched back to Global, you want to be on CDMA only.
Yeah I had some weird battery issues when I first updated too and I found that the network setting had been set back to Global. I changed it back to CDMA and recharged overnight and the battery life is back to where it was before the update. Don't know if that's what fixed it or not but it certainly is easy enough to try.