Thanks for the question. Yes, the AI can be lacking when it comes to details of how units move, and how they attack, and so forth. Really its only good if you crank the handicap way up and give it a big advantage. Besides that, I have no doubt that it will probably not understand how to use certain units properly on the attack, since there are so many details involved.
That being said, if you have a small BTL (save game) file that immediately demonstrates the AI doing something stupid with those units, such as, the AI having MG and field gun units sitting adjacent to enemy forces, and they do nothing but sit in place in Travel Mode, then by all means please email it to me (volcano (at) esimgames (dot) com).
Not promising anything because I don't recall the last time the AI was ever adjusted or improved in these games, but who knows!
Also, if I want to play solo its often better to just play it hotseat against yourself. I have played many FWWC scenarios like this, and it can be fun mental exercise. Just a suggestion if you haven't tried it and you want a better solo opponent (plus you win every time!).