Here is something, I noticed some time ago. Not sure, if this is the right place to post it, but maybe someone has a better idea, if this is actually a bug, or a feature. If it's a feature, then it's something, that should be erased, cause it's a big handicap.
I tested this with the Su-27 and Mig-29S on the 1.2.3. version of DCS.
On the take off, on the exact moment, when you just lift of from the ground, the pull/push is locked. More specific: The aircraft follows only a certain amount of pull but then stays and locks it. If you then try to pull the stick fully back, the aircrafts will not follow this input and just keeps flying the relativly smaller amount of pull. You can see your stick in the cockpit going all the way to your belly, but the aircraft is doing nothing. After about 3 - 4 seconds, it is then possible to regain fully control of the pull and push.
This may be not noticable on formation take offs or combat operations, but I noticed this, flying some practice rounds of my solo aerobatic display.
Try it yourself and share your thoughts. I'm very curious, what is going on there. If you, for some reason, can not reproduce this situation, I can then also record a track.