To be more precise, it seems the problem comes from some specific USB devices and not the number of devices connected, at least in my case. I've a DD1 with pedals, shifter and handbrake connected to the base, 3 Virpil devices and some additional CSL Elite pedals. If the CSL Elite pedals are connected, the framerate is capped to 83 fps, even if all Virpil devices are disconnected. If everything is connected but the CSL Elite pedals, no fps cap.
Bumping to state that this solely was the issue for me. Unfortunately I have a separate wheel base so I can't connect via RJ12, so to fix this for people who use multiple different pedals and wheels together would be really nice.
