My D2 was rooted with Z4Root. I had frozen some apps using Gemini App Manager and used a few root apps like ad-free, Barnacle wifi. I never uninstalled any bloatware or installed any ROMs, etc. I allowed the Verizon standard GB upgrade to come down and install successfully without unrooting and had no issues. Can't guarantee you the same result, but there's at least one data point for you.