Interesting thought, try a 660 mm scale and see what you think. Longer scale length guitars are "said" to have higher tension, but they seem to play easier. I have three luthier built 650's which are nice guitars. The 660 mm (a vintage Takamine from 1977) plays easier, is equally responsive, and is louder. I would advocate against shorter scale guitars for multiple reasons. In general they are not easier to play, but just my experience.