Hi Bernd,
I've taken a look and you are absolutely correct that there is a phase issue with output B when those two effects are used in stereo mode. I'll add the bug and it will be fixed in the next release.
Also, I will add a feature request to speed up the rate of the expression pedal in PitchFlex. We will have to see what the limiting factors are and if they can be addressed.
Thanks,
Dan Gillespie
