I can't say if we have anyone actively contributed that is interested in this. That being said, the main inputs developer (Billiard) was working on something similar a while back, you can see that here: https://github.com/dolphin-emu/dolphin/pull/7614 . Someone else came up with a similar idea (using DInput) and that change is here: https://github.com/dolphin-emu/dolphin/pull/10132 . However, we'd prefer the logic started by Billiard because it also solves an additional problem that DInput has.
Regardless, like all dev tasks, it's possible someone will come along and finish this work. It would be nice to see this in Dolphin, as you have mentioned.
Regardless, like all dev tasks, it's possible someone will come along and finish this work. It would be nice to see this in Dolphin, as you have mentioned.