Hello Laurent,
One bug found - when I load a multi-template using Unison with 2 voices, by default it uses all 8 voices, I have to click Unison button 2 times (off/on), then it is OK. This should be easy to fix.
One wish - configurable aftertouch attack/release time - even with soft aftertouch curve it is sometimes too steep, especially release is difficult to control, and it shouldn't be difficult to implement it (could be on S+Velocity and S+Aftertouch).