Airmen
I don't have any issue with engineers checking with a colleague after any flight control repair, in fact I am surprised that it is not SOP. It obviously is not, or is only paid lip service to, however - remember the A320(?) about 10 years ago out of maintenance on which the spoilers were still disabled.
I read your post to suggest that as a matter of routine, pilots verify flight control movement themselves, or with the ground crew, before each flight, and was pointing out the problems.