I searched the forums but couldn't find this mentioned, except for a possible reference in the general discussion thread, but I have no idea how to search 100 pages of an individual topic.
I have been experiencing periods of extreme lag during battles. I'm pretty confident this is caused by the reduction in distance between soldiers, which in turn I suspect causes some pathfinding freak outs. I had a similar issue with some versions of Darth Mod in ETW. This is definatly not a computing power problem.
Is this a known bug? If it is, have you tried increasing the distance between soldiers?