Cascade - just FYI, Robin Walker confirmed to me through email that I could heal 100,000 HP and it would do nothing for my crit rate (in other words, it stated that healing does not increase crit rate) We're just talking about healing itself doing crit-increase vs. assisting. I agree it should be a WORLD lower in increasing than kills/assists, but it should do something IMO. (for example, if a kill = +5% chance and an assist = +2.5% chance, then it would be nice to see a +0.1% per 100HP healed or something like that.
Atomic-
I'm not sure. TBH, if I see Valve continue with other classes that have guaranteed crits, I'll feel the Medic was jipped. They just have to be creative with the "stipulations" of the guarantee. The reason why I suggested the Medic's is because it USES up his resource of Ubercharge. For example. A Pyro with the Backburner could attack someone from the back, get a crit kill, and then do that 4 more times in a row if he were lucky enough. But with the mechanics I put into the bonesaw idea, the Medic depletes his resource (Ubercharge), so he wouldn't have a constant source of guaranteed crits - he would have to be forced to heal (promoting non-battleMedic behavior) to gain the chance to use the crit. I was, like you note, concerned about not wanting to promote the Battle Medic syndrome, but at the same time, giving legitimate Medics a chance at defending themselves should a situation arise. But if they miss a swing or have no ubercharge because they weren't healing, they don't get the crit at all.
Again, it's just an idea, one I hope was more in line with the promotion of good healing Medics and one that wouldn't reward or promote Medics actively attacking.
I agree with you that the Pyro/Heavy are offensive and the Medic is not (nor should he be), so I was hoping that the limitations of resources feature that I implemented would serve as an adequate con to the pro of a swing (or 2 at most), using up all his ubercharge. Plus, any Medic who runs towards an enemy who sees him often won't be able to get into range before he's killed (the Medic deserves that) because this crit would (like the other unlocks) be limited to melee range, and Medics are not (again, agreeing that they shouldn't be either) capable offensive classes.
Just my $0.02.