Fawful said:
In Farcry 2 you had a health bar split into five bars/segments, when you lost all your health in one that bar wouldn't regenerate but if it a bar didn't empty fully that would regen. You could also use a syrette to get all of the bars you lost back, which you could only carry a limited number of. However if you got down to the last bar you would start bleeding out and couldn't heal up until you dug the bullet out your body
Very similar to resistance: fall of man's health system, which had four bars and you didn't bleed out on the last one, but bloody hell you could lose that stuff fast if you weren't smart.
As for the system that was mentioned in the post, aka, I'm going back on topic:
I think people are worrying that it wouldn't work too much. Better to try a system and go "yeah, it's not working" before simply just writing it off before it hits the ground. I mean, if anything, it would add tension and make you more desperate in a fast-paced game, and generally encourage teamwork more. Simply saying into the mic "Cover me, I'm healing up" would either get you killed, or get the team to actually, I don't know... Cover you perhaps?
So as for me, I think it would be a good idea. But, then again, to each their own eh?