Secondly, Delayed reinforcements?
After I got the 1.2 patch I thought that my idiot AI help problem was solved and it was but ever since day 1 I have been bothered by the concept of delayed reinforcements.
They reason I hate this concept is that is once again dumbs down the strategic part of the game. There is no point is carefully co-ordinating army movements if you cannot put the army in a numerically favourable position. This works to the AI's disadvantage as well. I can challenge two armies at the same time with a 1 in 10 chance that if the combined forces are greater than mine, I still win. It allows you to just steamroll in, park on a mountain and even though completely surrounded, still beat the AI backwards.
This seems to be a performance issue. You may want to set set UNLIMITED_MEN_ON_BATTLEFIELD in preferences on true. Your system has to bear it though.