My vote goes for the FH-2 here. Here's why...
First of all, it's intended to work as a USB host. This is a tad different, because it means you can connect MIDI-over-USB devices directly to it. This will result in a bit better timing, but also in that you can use the FH-2 to connect pretty much any USB controller into your modular rig...and your DAW, too.
Second, while it does require a bit more programming savvy, once it HAS been programmed for your use, then there's little need to do that again. But the FH-2 improves on this by adding some extra operational modes AND by allowing memories for different setups. So, let's say you're using this with the Digitakt in your studio, but you need to gig live with it being controlled by a Keystep. Simple...just switch your preset to a different one, plug in the appropriate device, and there you are!
Third: MPE, baybee!!! Yeah, you can hook up something like a Linstrument to it, and as long as the FH-2 has been taught what to do with it, you're golden. You can also assign any of the MPE controls to a CV output, so...well, that's a rabbit hole in of itself!
Last: expandability. If your modular grows, the FH-2 can grow...up to 7 more FHX-1 expanders can be linked to it for a maximum of 64 assignable outs.
And, oh yeah...you can use it to auto-calibrate your VCO tunings. Smooth!