In the current test version for the Mac, it is possible to shift arty fire while the shells are (logically) in flight. This is very effective, but unrealistic. Example: shift a 155mm battery 1000 meters, switch from Adj to FFE, and to ICM rounds directly on top of a BMP Company when the time to impact is 7 seconds.
How about inserting a resonable delay, or just make this switch effective in the next salvo.
BTW, I'm glad you found a publisher--you may remember me from a few years back when TacOps was published by Arsenal.