hi
nice work! you certainly arent afraid of doing BIG dioramas !!
the only thing I would recommend you look into is your figure placements - the guys in the scene with the t-34 are a little mismatched. some look calm, and peaceful, others are panicking. The russians are assaulting them, they would be scared - either into running, or pleading with them for their lives.
The only thing that can help you with this is plenty of reading, to get an idea of their feelings. I recommend books such as "The Forgotten Soldier" by Guy Sajer if you're into the Eastern Front, or "Visions From a Foxhole" by William Foley if you're into the western front. After reading these books, I will always remember some of the things in them, especially about the war between the Germans and the Russians and how neither side were particularly nice to prisoners.
you have certainly got a hell of a collection!!! I like the sherman on the LCT the most but i'm mad about shermans