I was wondering about this as well ever since I started messing around on the site, checking out everything I could. In one video I saw an Operator disguise themselves as an enemy player and subsequently kill another player. Having unlimited lives would kind of kill that ability in multiplayer if the person you're disguised as walks up and tips off your enemies that you are not that person. And like you said, adding more importance to medics would be great because eventually you'll be shot, and when you're shot you get incapacitated. Why would the medic bother, besides being a good teammate like they should be, reviving you when you'll just come back in a few seconds? ...Sorry, went a little crazy with my opinion, but yeah, sounds like a great idea. Maybe the command outposts could give extra lives to teammates?