Well I dirty flashed from MR1 by mistake, I forgot to "wipe data / factory reset". An adamant clean full wiper I messed up. I did wipe Cache partition, Dalvik, and Format System, and forgot to factory reset and accidentally skipped the rest.. When it booted I thought I chose the MR1 by mistake but I checked and I'm MR2. Its all working great though. I guess I'll be an experiment for a few days or until I see an issue. To me a dirty flash is like always playing Russian roulette. If there anything in particular I can try while I'm dirty let me know.