Sorry I don’t, I’ve mainly been using Play+ for creating more percussive atonal jams, or loops.
When it comes to creating your own loops, there ain’t nothing like the Play for that, especially with it’s randomise algorithms .
I’ve not really dug into the synth engines myself to much, I’m not a big fan of how Play handles polyphonic notes, in that you have to select multiple tracks and then edit notes over multiple tracks, instead of the whole data being contained inside a single track or clip, not sure why they went down that route workflow wise? it’s way too convoluted for me personally that is, especially coming from using other devices.
If you want to try using loops, you could give this template a go which is designed to give you a sort of faux time stretch, along with messing with the Attack and Decay of the loop sample and drenching them in either the ‘Unchartered’ reverb preset or subtly use the ‘Drone’ preset, I hope Polyend add time stretch to Play down the line?