I used Titanium Backup to rip out every piece of crap that Sprint and HTC felt the need to burden down my One Max with. I said to heck with freezing... Since it was the 1st week I had my phone, I figured if there were any issues I'd just flash my NAND. 8 weeks later, not a single hiccup. Between Nova and Xposed, there's nothing I can think of that I'd even need a custom rom for!