I think that what you have there is good, for Photoshop I need step back.
however I honestly think the idea itself needs tweaking.
in settings for artist pad it would be good to be able to choose which software.
in manga studio 5 undo is great in Photoshop I need step back in light room I want 1 to 5.
I assume it would be fairly simple to get say the top 10 apps and there most common shortcuts and then do that.
the buttons I need are so different depending on the app.
I don't use it now because of that and the size.
I assume people can build there own but I think the top ten would set it up great.
and actually the ability to switch without going into settings would make sense.
sorry