Hi Kazik,
1) FAST button control with Bookmarks: this can only work if you disable the "ENC_AUTO_FAST" feature in your MBSEQ_HW.V4 file, which overrules interactive FAST button changes
Background: with ENC_AUTO_FAST, FAST mode will be auto-selected depending on the selected parameter layer, and can be temporary (!) overruled by pressing the FAST button. Without this feature, FAST button has full control over the encoder behaviour
2) HUMANIZER changing CC values: works at my side, would need more input to give you guidance, please use the appr. thread to discuss at the right place
Best Regards, Thorsten.