Episode 5.5 is as feared a recap episode without any new scenes at all. Mostly it's Miho introducing her circumstances, then her friends in the first half. Second half is slightly more interesting with Miho introducing the other team's individual members by name (finally), and Yukari providing intro on the tanks and some technical tidbits (The Matilda II's are identified as the Mk.III/ Mk.IV model).
The one new scene we get in this episode though is the End Card:
Also, someone finally did it!!!!!!