QBs against AI are not that great because:
1) The AI's unit choices are generally rubbish. This totally kills QB in CMSF, since you have to let the AI pick and you usually end up with 25 HUMVEE's vs 12 T-72's or other nonsense.
2) There is a tactical AI (units deciding what to shoot at, when to take cover, etc) that works pretty well. However, the strategic AI is extremely basic, it essentially boils down to "Unit Group 1 goes from A to B to C at a pre-determined pace". So the units are randomly assigned to arbitrary groups, then take off towards their destination with absolutely no regard for any other factors. This isn't so bad in hand-made scenarios since the designer can send specific units to specific points and kind of guess at what the player will be doing. However, in QBs everything is random, so the AI's plan of attack becomes very hit-or-miss. More often than not it's like lambs to the slaughter.
I loved QB in CMx1, since, while the AI was predictable, it would at least react to changes in objective possession, but it's barely playable against the AI in CMx2. AI units that reach the end of their pre-determined path will just sit there staring off into space until the clock hits 0:00.
P.S. I guess this is my first post here but I've lurked for a long time, have several Matrix games. Just wanted to clarify that I love CM games, not here to attack them or anything. The QBs against AI are simply not worth your time.
"Before Guadalcanal the enemy advanced at his pleasure. After Guadalcanal, he retreated at ours".
"Mama, There's Rabbits in the Garden"