@asiair@zwo#40638 Well, the added complexity is zero, so that can't be the reason. Just add an "Algorithm" dropdown in the advanced panel to select Hysterisis (default) or PPEC.
In fact, it might even make it simpler, since you would reduce the tweaking users need to do to get good RA tracking.
In case you aren't familiar with the feature, here is PHD2's explanation:
https://openphdguiding.org/man-dev/Guide_algorithms.htm