The AI in CoH2, spams artilleri units, i've found in my game that the katuscha(Russian AI) is a favorite weapon of choice, and that means you have to stay in constant motion, and clustering up will result in massive losses on your part. this is just the standard difficulty, i've played on expert and won, but it took 4 hours.
They have advertised that the AI would be more advanced in the game, and i can only agree, you really gotta know your stuff to make this look easy. I know of friend that could take out expert AI in CoH in a matter of a few minutes and on standard in CoH2 they are locked in trench warfare
I'm loving the game, and the new AI is one of the best parts, you wont get that exp easy, you really have to fight for it. even with the trainer lol