Add an option to save different shortcut sets and change them quickly
Add an option to quickly set up shortcuts to the Photoshop default
One of the big problems that prevent many people from migrating from Photoshop to GIMP here in Brazil (and I believe worldwide) is the impossibility of quickly changing the shortcuts to the Photoshop shortcut pattern (yes, many people tend to be lazy, and do not want to change one by one or adapt to the GIMP shortcut pattern, because they would have to learn everything again).
Due to the lack of this feature (which already exists in Krita), a GIMP Fork/Patch was created here in Brazil called PhotoGIMP.
Now that the GIMP interface is becoming more familiar to Photoshop users, I think it is a good time to add this feature. The idea would be that it would be possible to change this setting in the Keyboard Shortcuts menu or in a home screen that would appear when opening GIMP for the first time (as it exists in Blender).
To implement this, you can analyze how it was done in Krita. It does not seem to be a difficult task for developers.