1 - no I don't think so. I expect some people in general will be better at handling jealousy etc. Being a veteran may mean you have more experience in dealing with jealousy, but that doesn't always mean much. Its almost akin to speaking with someone married 4 times about being married. Will they be better at it then the unmarried couple?
2 - hmmmmm...how bout mentors?...the idea of "leaders" brings about an exec level role that may grind peoples gears the wrong way. Just a thought