Really? Is killing AI tanks that can't protect themselves by putting one vehicle in their back, and one at their fronts really worth a replay? I played lots of USF before switching to OKW main, perhaps I learnt from them how to spread forces, flank and cover. Not worth a replay, man. If you really need one, just watch Barton vs Jesulin ESL Finals on how to deal with USF "line of defense" and Callips.
Yes, because no one keeps Calliopes without AT protection, no one leaves flanks without mine field (unless you play agasint brain dead enemy) and it takes 30seconds for Panther to kill 1 Calliope.
I can't imagine situation where you just drive behind enemies' lines without any mines and simply snipe Calliope for 30secs without any AT protection, unless (again) you play agasint brain dead enemy.
I did watch Jesuln vs Barton and I saw Calliopes raping Barton's army.