Damn m8, I can't say a bad word about grid keys, I think at my noobish levels of play I have those fractions of seconds to look at the status bar ...
Well, when i play Sim City, eh OKW in 3v3+, so do i, but otherwise you're screwed by muscle memory.
I have considered doing an 'Art of Defence" Guide because a lot of people use defences very badly...
Like going to the North VP on Steppes and camping the munitions whilst building a great wall of wire and sandbags.
Kinda funny, i do the exact same... on the mid / south.
I think a well scaling guide would be good. Mini-wiring on 1v1-2v2, how to lock down flanks in 2v2+, etc...