Keith,
Besides the sign issue already mentioned, the only thing I'd say is that you have a 68 ton tank sitting in a building. Since my experience is that most European buildings have a basement...........well, I think we could all imagine what might happen. Granted, this particular building may not have one, but playing the odds.....I think too many modelers stick tanks inside of buildings which was, I'm sure, a tactic rarely used, due to a lack of mobility as well as the basement issue. Just some food for thought. It certainly doesn't make your scene "wrong", but it is, I'd say, at least a bit questionable.
Also, and this might just be an issue of the photos, the tracks on this tank look really clean and barely weathered. My photos always suck and I lose a lot of detail in them, so that might be what happened with yours.
The interior of the rear turret hatch should probably be the color of the tank (dark yellow) rather than white.
I think you did a great job on the building, the rubble, the figs, and the Schwimm. I'd say weather the tank a bit more, especially the tracks, and you're good to go.
Rob
Rob