its possible (but not ideal) to go back to the vanilla font, but implementing a new font is a lot of work
also going back to the vanilla font will break a thing or two, for instance you will no longer be able to use the controller button mod with it for now (the creator of enhanced stock UI is currently working on that mod for the vanilla font spacing)
the UI has tons of (hext) code in it that changes the windows to make the font work (among other things), so you'll have to delete the font files, chunk1 files (also alters dialogue windows, in a different way than the hext code), remove all hext code that breaks the vanilla font, then repackage the .iro...
EZ Peezy right? and after all that there STILL might be something i'm overlooking that you might have to deal with