This is why I don't even bother with sending MIDI to modulars, for the most part. It makes far more sense to use soundcard-type solutions with various software that can send straight CV/gate/trig/clock/etc via a DC-coupled audio interface, because you tend to not see those sorts of latency "slop" issues. And if this starts running noticeably ahead of the MIDI-driven stuff, it's easy enough to get at just those tracks in the DAW and nudge them into place. Of course, we all know about Expert Sleepers' modules, but their software (Silent Way) can also work via a proper digital audio interface with DC coupled I/O. I use a MOTU 828 mkii for this...8 in, 8 out, Live's CV Tools doing the work.