Just an idea

[Q]

All good ideas but I share the opinion of suicide_junkie that this is more or less already in the game with the ship/fleet experience.
The new thing would however be that the experience/moral can decrease under the circumstances you mention and that the success chance of crew conVersion depends on the experience/moral of the target ship.
If you do it based on the existing feature of the ship/fleet experience, it might be not too much work for MM to implement in a future patch, so suggest it to them.