I think the quick fix offers an interesting mechanic to the game which is add great mobility to medics, so I think it should definitly be incorporated accross the scenes in 6s, but definitely not with the stats it has right now.
We should petition or at least warn valve about the current broken status of this weapon.
Currently if one team is running QF the enemy team has to run it too or else they are at a disadvantage.
We should really pass the word to valve, IMO an appropriate fix would be to increase building time to that of normal uber, or cut normal healing rate by half or remove it completly leaving the "quick fix" part of the weapon for its uber only, or do both.
I think the half overheal stat is good for the weapon but one of the other stats need some rework