What this game already does is have somewhat equal hight between genders (if you go with F 100 and M 0):
http://i.imgur.com/1eFG1wm.jpg
Exception being Au'Ra.
Personally I don't think proportions would be an issue if you scale them up equally:
http://i.imgur.com/u6ko3Qw.jpg
A forum is there for suggestions and general feedback, I don't get why people feel the need to discuss technical side of things like they were the developers themselves. :rolleyes:
I don't see it as much of a problem as an artistic choice but I'm also all up for more character customization options.