Crew members should get tiny healthbars above their heads that follow them around Terraria-style. This would make keeping your crew alive a lot easier as you know when to let them regenerate health instead of having to guess the amount of remaining health they have.
Hmm... I like this idea. Perhaps also having a button appear above their heads when alt is held, allowing you to customize their build, but that's for another thread. For now, I say yes to health bars.