What's confusing on this ? Proper white balance has Temperature and Tint., or, in CGI, single color compensation slot (like in Vray).
I don't see how this is cluttering. Sure, it's not utmost important at all, but it's not gimmick..
It's not only about lights, color shifts occur upon interaction with materials likewise, so setting your lights to regular temperatures doesn't mean.
Yes you can do it post very easily now but, Corona already has great interactive tone-mapping in frame-buffer, so this would be good addition.