I've played EF for quite some time now and one issue I've always noticed cropping up among the AI is that your allied units love to just leave all their units in the base and do nothing. That is, the enemy AI still continues pouring troops to the frontline but your allied AI units simply just stay at their bases and perhaps just send out one or two conscript units at a time, while you get IS-2s, Su-76s, and large numbers of strelsky just idling at the base doing absolutely nothing.
And I've observed that the Soviet AI sometimes just builds so many observer teams that 90% of all their infantry are observers? What's up with that?