Later in the same game, France DoWed Austria, and Russia came to Austrian support. Here's where things really get weird.
First, all the Russian corps that had been heading for St Petersburg veered off to Moscow, and most of those that were already in St Petersburg moved towards Moscow. (Actually leaving it open enough that it could be vulnerable to a Swedish attack.)
France didn't have any corps (apart from the Swedish one) east of Venice, but OK, it's at least nice to see the Russians not sitting in Grodno waiting to be annihilated by Nappy prior to an unopposed march to Moscow.
But then, once they had gathered in Moscow, they all set out for different fronts again: some to Prussia (again, nice to see them actually crossing the frontier, but it would have been better if they hadn't foraged to Moscow and back first), and some back to the Caucasus, presumably to attack the French-controlled Persians. I say presumably, because they all foraged to death before they got there, the last factor expiring just as it entered Circassia, whence it had started so many months before....
I can see that the AI is actually trying to think further ahead than it used to, so that's good. But at the moment the results are worse, because the left hand doesn't know what the right hand is doing (DoWing a minor then running away from it; gathering in Moscow then fanning out to seek the enemy), and because of mechanical troubles (not building depots). On that last point, it's not easy to tell from the log exactly what it's doing, but I believe that in one example, it fed several infantry corps from the depot they had marched away from rather than building a new one where they marched to (I believe this because the log showed no foraging losses in those corps although it was Russian winter and they'd used their movement allowance), then (out of money, I guess) foraging the cavalry and losing factors there.