id have to say yes too, but only if the teams uniform colors stay pretty much the same, would be hard to spot a friendly from an enemy far away if the colors would match
German and Soviet uniforms are so different, it would be impossible to mix them up. Colors and shapes are completely different in every way (except for jackboots).
I already voted yes for this.
Edit: In the OP, there are a few things wrong with the German customization ideas.
1.) There was no splinter smock around Stalingrad in that time period.
2.) Officers didn't really have any variation in tunic, as they wore the same 6-button field-grey collar tunic until the late-war period.
3.) Cross-straps were also eliminated by this time period.
4.) As far as I know, chicken wire was not around Stalingrad at this time, either. I'm not saying it was not there, but I just have not seen any photographic evidence proving so.
5.) The first cap has no branch of service identifier so it would not exist.
6.) As for the second cap, there has never been any camouflaged German head-dress of any kind, so this is also a farby item that would not exist.
7.) The third cap is a panzer-crewman cap, and it has no national eagle and pink branch of service identifier. Panzer-crewman had no variation in uniforms at this time, either, and no infantry would be wearing a black field cap.
8.) The fourth cap, the M43, was not around Stalingrad.
9.) The last cap is an SS cap, but I do agree that these should be interchangeable. Officers should be able to have a choice of wearing their visor cap, field cap, or helmet.