Mild sorta-derail:
So the flaregun is still next to useless compared to the shotgun.
ORLY?
Weapon>>>>Point Blank>>>>Medium>>>>Long
Shotgun>>>>>80-90>>>>>>>10-30>>>>3-10
Flare>>>>>>>27-33(+60)>>>27-33(+60)>27-33(+60)
So the Flare does more impact damage at all ranges apart from at point blank.
You're playing Pyro... So why the hell would you be using your shotgun over your 135-180dps Flame-thrower at close range?
Please don't respond just with "It's harder to hit with the flare gun" as that just says that you are 'useless'[with the flare], not the weapon itself. (You'd also have to hit twice with the shotgun).
The exceptions obviously being:
Straight duels with other Pyros, although straight impact does more damage this is one situations where having an easier to aim weapon might outweigh the damage caused (although you are still likely to use the Flame-thrower up close).
Underwater (Which frankly noone spends a lot of time being...).
Wait wait, they changed the flaregun now?
Yes does a minicrit if you hit an already ignited enemy with it. But that only counts for you and the flare hit not the afterburn.
Can you point me to the particular patch note that explains what you are saying?
TF2 Wiki states that Flare mini crit-impact does 41 and burn causes +4 damage.