Note velocity in MSC 4

I have uploaded a new edition of a piano piece using Musescore 4.0 (but not Muse Hub). You can compare it:
https://musescore.com/user/14923616/scores/9265285

with the 3.0 version.
https://musescore.com/user/14923616/scores/6471812

I didn't use the Muse Hub piano because it does not deal with notes velocity. What a shame 'cause the "Grand Piano" sample is so good.

But even using the MS Basic piano I had a great difficulty to equalize the sound. First: the scale used in MSC 3 note velocity is not the same at MSC 4. And if you have negative values on MSC 3, MSC4 respects this values, but interpret them as positive. This means you have to deal with it manually, rescaling it. Second the gradient of crescendos and diminuendos sounds also differently between the 2 versions (maybe due to the same scale difference). 

Worst: lack of piano roll edition difficults everything... Please, make it available as soon as possible.