Interesting with the addition of the 152. Hopefully it turns out alright. I know I've seen it totally wreck the Germans on PaiserPlatz. Shutzesepp nailed 12 Germans in one shot, ha. One important thing that I've noticed about the SU-152: It's suppression value.
I'm not sure if player who have motion blur turned off will notice this, but the supression blur for the 152 sticks around for a long while, at least on PaiserPlatz. As in 10 seconds or more. It makes engaging at long ranges as infantry far more difficult. This may hamper the Germans more. However, the removal of the SU-76 should help, as you said that thing can tear up the bridge.
Also, I'm starting to run into Russian tankers who are memory shooting through the fog at the central AT gun at the Moltke. If there's some way to prevent that, ie. shifting it slightly or putting up some sandbags, that would be great.