Wait, you...want a Quick-Fix? ._.
Yeah. So? I'm that kind of person. Instead of humpin' Heavies, i actually heal. It's the only f*cking thing i am good at and useful for.
Why...would you even need it? No overheal. :v
I heal only when my teammates need it, and i want to get to the frontlines/make a run for it as fast as i can. The Quick-Fix does both of those better than any other Medigun. As for no overheal/uber, i never used my ubers anyway and overhealing just makes me more of a F2P Heavy-humpin' Medic.
It's not just about pocket Medics, it's about it's uselessness when it comes to a push. Ubering or Kritzing a Heavy or Soldier can help the whole team push forward, so that's a good time to, as you put it, "hump a Heavy". The Megaheal doesn't give you the firepower or survivability to push. It's fine if the enemy team tries to push and you need to keep ze healing on all of ze frauleins, I suppose.
On the Steam-Powered User Forums, someone said something that made a lot of sense: If you're the only Medic on the taem, use the Medigun or Kritzkrieg. If you already have a Medic with one of those weapons, go ahead and use the Quick-Fix.
And if you're not good at doing ze hurting, have you tried playing as a Pyro? Pretty easy to pick up.