The builds are nice. I like the way how you paint your models. You have a knack for painting.
However, there are some things that needs to be pointed out. Aside from those already mentioned:
1) There is a big gap where the front glacis plate meets the transmission cover. It becomes bigger towards the left side. It's like you haven't glued the top and the bottom halves of the tank. If you have glued it, there might be problems in taking it apart to re-glue again. A solution would be to put sandbags and equipment on front of the glacis plate.
2) The tank would have a lot of "color" if you put decals and stowage on it.
3) Where's the antenna?
4) The machine gun juxtapose to the 75mm is missing.
5) The tank is a tad too clean. It would be better if you could weather it more. Mud splatters, chipped or faded paint, soot on the gun barrel, etc.
6) For your figures, they are very well painted. However, it would be better if you could add straps to thier guns.
7) The figures' boots are too clean in relation to the ground. Drybrushing a bit of groundcolor to the boots will do the trick. Also, US GI's boots are brown, not black.
8) Although nicely painted, the building is a tad too clean, too. Drybrush a little dust/snow color on the walls. Add broken glass (with the use of clear styrene plastic or acetate) to the windows. You can also scratchbuild a simple door to the doorway.
9) I can't also "relate" how come there are two figures talking on one side of the tank while two others are in battle on the other side. The dio is titled "Cornered" so we assume that the US GIs would either be 1) fighting for their lives 2) huddled in a corner, trying to shoot some unseen enemy 3) firing at something while covering a "rescue" of a fallen body (a sense of retreating).
But someone talking casually on the other side while there's fighting on the other side? The dio's atmosphere is broken by this single detail. And a "tight" central theme is very important in a dio.
It would be better if you could replace the casually talking figures with ones which are talking, but crouching. Put a sense of action between the two talking figs so that it would be in synch with the other two figs that are fighting.
Personally, the Tamiya Sherman built out of the box is good but it could be improved. That is what I did to my Tamiya Shreman M4A3 for the Ardennes Offensive Campaign. I got this site from theBear and Shonen_Red as a guide to improve the kit.
http://www.usarmymodels.com/MANUFACTURERS/Tamiya/tamiya35122.htmlOtherwise, it is a good dio.
Angela