Sorry, in advance if this has already been asked, I did my best to see if it did.
Anyway, maybe it'd be a cool Idea if new crew members you gain later on in the game are all already trained in some way... For instance, If you get a the rock captain from one of the random events, that he already has level 1 on being the captain, or maybe mantis-people already have some experience fighting...
It's a nice idea, esp. since in the later stages a rookie crewmember is not very usefull. It would be great if they had some skill even if it wasn't the skill you really needed.
But free crewmembers are very valuable and the chance of getting a skilled one should be lower or at least carry some risk. Like the event where a supposed deserter offers to join your crew, only to sabotage your ship instead.
i really disappointed about Legendary Thief Mantis that come without any damn combat experience -.-!!
but since all experience end at lv 2 maybe they need to add more lv differ to make thing look difference.