West Point 101 : An obstacle doesn't need to stop the enemy by itself to be considered a viable defense. Slowing down the enemy and creating a temporary killbox for your men to take advantage of is sufficient.

Buff I think Rygart and by extension the Broken Blade team went Evangelion on us (Rygart behaved like Shinji)

But I enjoyed this episode and especially Borcuse's behavior which gave the enemy shades of gray to be painted with.