The other nice thing about the Expert Sleepers stuff is that you have a range of expanders, which allows you to configure their interfaces with extra CV/gate outputs as needed. But another option you might consider is not using the Varigate 4+, and instead putting in a Squarp Hermod, which offers a MIDI interface, 8-track sequencer, clocking, and plenty of I/O. By doing that, you then flip the equation around so that it controls the M32 (with a lot more capability than the M32's own sequencer) as well as quite a bit more in the build, with no need to kludge up some sort of interfacing between the M32 and the rest of the rig just to get all of the modules talking to each other properly.
-- Lugia
I agree that the Hermod would definitely make stuff much easier (plus 8 tracks are amazing), but the idea of having to program all of my stuff on a screen really turns me off for some reason.. I absolutely love the M32's sequencer precisely because of this immediacy that I think the Hermod would lack.