portmanteau
This is probably one for an AME to come back at but in the meantime and with no disrepect to them intended I think you're overestimating what goes on when the AME renews (or not) your Class 1, 2 or whatever.
I don't see how even the best AME can't see/detect everything that might be wrong with you in a short consultation.
In fact Lubitz wasnt even determined to hide his condition,
Correct - so how does your plan to stop this ever happening again uncover someone who really is prepared to lie and has hidden his/her tracks?