It appeared that the British have a harder time of it. They have to move quickly to win the scenario, and the Germans are merciless.
Even without a Hidden Minefield card being played on the exit hex, there's little hope for the Allies here. 5 rounds is only just enough time to reach the paras and escape off the board, any successful suppressive fire and it's all over.
The Brits don't stand a chance. I think the scenario might need a bit of tweaking.
I highly recommend to remove from a desert deck a "Hidden Minefield" card. If German player gets it it's auto win for him (placing minefield on blue-shaded hex will delay an american squad and there will be no chance to escape before 5th round end).