There are discussions going on about 2 man MG teams going on etc.
What if each side were organised into groups, i.e. rifle groups, mg groups, engineer groups, etc. of 2-5 men each which are encouraged to stay and fight together. I know in reality groups may have been larger, but It would be a step closer to realism from where we are now, lone soldiers runnig about. This could be a separate game mode if not everyone liked the idea.