Procedurally-generated planets are a wonderful thing. If a MW game had that, you could drop literally anywhere. A million maps. Maybe they're not balanced, but who says you have to engage where you have a disadvantage? Not saying it'd be a silver bullet for a MW game, but I do think it'd be a nice tool to use. Take a bit of PG terrain that you like and edit a small section of it to suit your desires. Hand-crafted maps are of course better for the style of gameplay that MWLL typically offered, but things like planetary leagues would be... leagues better with PG.
MWLL couldn't be converted to SC with any degree of practicality. You'd basically have to start all over. Not saying that's a bad thing, but "porting" is not a choice that will lead to success. Also, you don't need to ask for Chris' permission or have some grandiose contract signed up; SC is gonna be mod-friendly. Mod teams don't typically ask for or need anyone's permission (as long as the principles of fair use are followed). Wandering Samurai just wanted to not step on anyone's toes.