It is a very nice keyboard layout. I'm very happy I discovered it (even if it was by mistake!)

Another example I can think about: remap the Ro key to toggle between international layout while it's pressed, so you can switch between layouts with a key right next to the shift key.

For example, on a US/RU settting, press Ro while pressing the 6 keys to the right of Tab in a sequence and you would get ЙЦУКЕН, don't press Ro and do the same: you would get QWERTY. Mixing and matching in both upper and lowercase would be very easy.