But I want to use them in an actually good Commander.
I dunno, I think Mechanized is probably one of the best 1v1 commanders USF has. It probably sucks ass in team games since there's no artillery or heavy tank but I wouldn't say its the worst.
Biggest problem with Mechanized is Combined Arms seems very difficult to use properly and get its munition's worth out of. Dozer Sherman is good, WC51 is great, 76mm Sherman is decentish.