Interesting, time to do your research then. Contact DynoJet and find out about the PCV and the latest software. Since 2008 I've been using that tuner WITH factory O2 sensors not only installed but plugged in. They are quite adamant that you do NOT disconnect the sensors as was the case in earlier tuner versions.
DynoJet does have tunes for the PCV for the M8, FuelMoto does not. FuelMoto bases their research and work on the M8 with reflash only. If warranty is a concern then a flash tuner is out. It is detectable, even when a re-write of factory tune is done. My 2018 FLTRU has a 7 year warranty. I'm not losing that for a flash tune. The extended warranty was a selling feature for me. The PCV works well on fuel and ignition trim only. That's it. If you want to control all 200 parameters in your ECU then you need a flash tuner. If you want to get rid of a decel pop or fill out a lean spot, then a piggy-back may the the way to go for you!