Here's an idea, pardon if it's stupid, but why not add MUCH more letters to jj2, such as arabic, chinese, or cyrilic, perhaps? If someone's able to draw them, that is.
Also, I would be happy to see letters like Đ,Č,Ć and Ž
БГДЂЖЗИЉЊПЋУФЦЧџШ, and much much more