Yep, the plugin works with MPE, though I'm also planning to add support for MTS-ESP, and MIDI 2 when it has wider support.

I haven't used it, but Scale Breaker is definitely a cool plugin, I do plan on stealing some features from it. Pivotuner has a step up in that it supports microtonal modulation resulting naturally from pure intonation (which is a bit of a niche case), but Scale Breaker's ability to sync across tracks is super useful and something I am planning to add.

Thanks for sharing your track, it's always nice to hear things using pure intonation!