WC51 *WAS* the most overpowered USF start against OKW. I steamrolled OKW teams in 3v3 and 4v4 by denying any forward HQ setup and killing lots of squads. Now the WC51 is not great considering if OKW get any truck up anywhere, they are essentially useless.
Also wouldnt doing this swap make mechanised essentially a better commander overall? I think it's good as it is and the improvement if anything should be done in the M3 halftrack assult group which costs too much manpower to be effective. The arty is great vs OKW trucks and the recon uncounterable.
This.