I really think this device does not need a lot of fixing. One of the best I have ever owned. The battery is much better than I expected and I really think HTC did a fantastic job with Sense on this device (beside BlinkFeed).
I read that some Verizon customers were getting surveys about pre-installed software...probably because of all the negative feedback from users. The HTC One M8 is by far the most bloatware polluted phone I have ever owned.
I hope Verizon and HTC are paying attention (most likely not).
Also, my wishlist beside the removal of bloat is...
-Fix the Gallery and get rid of that preview window, whatever that is
-Ditch BlinkFeed - I have no use for it, eats battery and is not removable
-I seem to be having GPS issues when using Google Maps, but I need to do more testing and research, could just be my phone
What I would really love to see is a Google Play edition for Verizon...