Pathing isn't terrible but I have lost a few games to it. It is most noticeable when controlling multiple units at the same time, which is essential when playing allies.
Last game I played I had three shermans. I lined them up facing the enemy lines and gently probed forward (this was an area I had only just retreated from so didn't want to wait for supporting infantry when I knew there were repairing tanks ripe for the taking). So I encounter two pak40s and decide to reverse and wait for infantry after all.
Except for the two lead tanks (as they had ended up in a single file after chasing an enemy unit) decided to do a 180 then reverse in a u turn towards the enemy and eventually back towards the initial destination.
Needless to say I lost a tank that should have simply backed up a few metres to safey. The other tank only just made it away on a sliver of health.
Try not moving vehicles as group but a single units. If many vehicles are given an order to move they try to move to point you clicked and get confused.