Don't forget, MIDI based arrangers have some pretty sophisticated things going on under the hood to smooth out glitches that occur when we ask for fills or variations fractionally late, or off beat.

None of this works with a loop. Everything is a trade-off. You get better realism with audio, at the price of a complete inability to revoice or edit it, and more easily perceived loop boundaries.

Seems like you have got your priorities sorted out, but I wouldn't be holding my breath for a software update to cure this completely (or a timeline on that update that won't leave you frustrated). Hopefully, the great sound will help you get past this (it certainly never did for Tony!) and keep you from turning as bitter as some have become