@nm0i are you looking to do full remapping or application specific tweaks? For the latter EXWM's built-in simulation keys is a nice option. Or custom key handler functions if more flexibility is needed. Probably not workable for a full remap though. And I guess EXWM is not for everybody.
@zrzz it began with me wanting to rebind one key on a gaming controller the way it won't affect main keyboard. :) I.e. I was looking for application and device specifit (re) binds at the same time
@nm0i I just took a closer look at the tools you mentioned, cool stuff! Didn't realize they worked on the evdev level. I will probably end up using keyd in addition to the EXWM stuff.