Agreed, I think that the font based on line-height would probably be more appropriate... ex: 12pt means you get 6 lines per inch (or whatever the os/device uses

Agreed, I think that the font based on line-height would probably be more appropriate... ex: 12pt means you get 6 lines per inch (or whatever the os/device uses) regardless of font. As long as the font scaling shows lines per the designer's desire. Then there could be some variance, but you get at least closer to desired output.