I think buddy aid is way too easy and highly unrealistic.
Why not make it more realistic?
Instead of current behaviour I think a two stage procedure could improve realism a lot. Instead that buddy aid is finished with one unit, a second unit should be needed to complete the task. The first one does buddy aid, the second one simulates a route for transporting away.
More realism: The number of the needed headcount of the second unit could be set double as high as the number of wounded to transport.
Example:
Two wounded.
Phase 1: Buddy aid conducted like it is now but after finishing