Gentlemen:
I'm very pleased to report that the current version of Aces High as of Jan2011 (2.22) does NOT appear to significantly change the timing or tactics of any of my offline missions. I've (briefly) tested them all and they all continue to work properly.
This is a relief to me.... in the past I've needed to recompile them all, "tweaking" the timing of takeoffs and arrivals at waypoints to ensure appropriate combat encounters. Sometimes I've felt this was worth the trouble; other times not.
Anyway, this time they all continue to work.