Wow... Nice work on the buildings! They look great. Oh wait... There ARE figures down there!
You've fallen into the "Bigger is Better" trap, my friend... Four-story buildings in a 1/35th scale diorama is way too much... They've completely overpowered the scene and story... Your figures really make it look like they were an after-thought..
You would have made a much more effective scene with the buildings being just over two stories tall, modeling them as bombed-out with a suggestion of a much taller building depicted by a portion of the next story and large amount of rubble with a shattered tree instead... You could still depict them as partially occupied and being able to keep the sheets in the windows though.. Also, that tree bothers me, unless the Sherman backed into that wall rather than passed by the tree and went through it. Also, it's got the same problem, being way too tall... I'll show you what I'm talking about.. Check out this photo of Shep Paine's Arnhem diorama. In it, the buildings are just a skosh over two stories tall, but give the impression of much taller buildings:
I disagree with my collegue about the TC though... There's a blind-spot about 20 feet in diameter all around a tank that doesn't allow you to see anything within it through the periscopes. So it's perfectly OK for the TC to be out, waving in the surrendering Germans, although I'd have him holding a pistol or M-3 while doing it. I did the exact same thing once upon a time, herding in a bunch of surrendering Iraqi troops, waving them around to direction of the troops that were there to take care of them. The fifty was too awkward to use for that, so I covered them with my rifle... I'd likely even have the bow-gunner unbuttoned, since he can cover the troops with the .30 from his position, down to about 8 feet away that is, buttoned or un-buttoned...
The GIs are kinda in unrealistic positions though, and they guy on the right with the bazooka is just wrong... Even if he were to do that, he can't fire it. His buddies are in the back-blast area and that's a no-go area that extends in a cone about 40 meters from the rear of the weapon. I'd place it on the ground and have him holding a pistol on 'em... Same with the bazookaman on the left, he's not being much use right now... And one guy isn't even looking at the Germans. You want to direct your viewers towards the action, and the best way to do that is too have your figures looking at it... I'd re-do them, were I you...
There's plenty of uses for tall buildings in smaller scales though... But in this case, they're a drawback, not an asset... Overall though, your building contstruction is excellent, and well executed and realistic...