This is a great idea.
I also think the 12 notes limitation is great in a way but depending on the kind of music you want to perform it can be a counter intuitive limitation too. Loading scales from other presets looks too complicated while performing (I don’t own a Terra yet and this is one of the limitation that makes me hesitant at the moment). It would be amazing to be able to switch between different scales in a playful way!
An easy muscle memory solution for switching scales on the fly would really improve the instrument. In my humble opinion.
