I enjoy it myself! Only played wargame once, I generally do squad assault with my brother. The AI is very inconsistant though. One match, it'll be somewhat easy, the next, they seem to know where you are at all times.
Overall though, I'd have to agree with you that it's a great alternative to get a multiplayer experience without having to deal with all the BS that goes with playing with the community.
I'll play squads when none of my friends are online because I dislike playing with most randoms in this game.
One thing I'll do is set a class with high assault killstreaks and play on recruit; yes I know it's not building any new skills but sometimes it's just fun running around killing everything!
The fact that you can earn limited XP and squad points that carries over to MP is also a great idea on IW's part. It's also good playing on higher AI levels (Veteran) for trying out different setups to use in MP.