The heavy weapons guy is a very strong class in the regular tf2 but what about ff2?
The heavy weapons guy is very strong with a medic but when ubered the boss can just super jump away because the heavy can't chase him.
Without a medic the heavy does less dmg and his escape is very weak.
Even a scout can do more dmg than a heavy.
I think that the heavy shotgun needs a crit buff or a mini crit buff because he is very weak now with low dmgs and weak escape.

No. The heavy has been the way he is for years, he's not suddenly become weak. Pull your socks up and work together. Engi's build amplifiers. Team. Work.

There is the taunt for that... AMP fields even more OP with heavies!
Gloves of running urgently...
Shotgun refil HP if you touch... or instead the sandvitch...
There is also the spirit warior build that make the heavy a close range war-machine!

The Heavy is mostly fine i think!

The shotgun only sets people on fire though

The strange one's only do that. A really powerful thing in open maps to annoy the hale and flinching his screen.

In my opinion, the shotgun is fine as it is.

If you taunt for crits the boss can easily kill or stomp you
Nobody builds a amp and if i ask for one a engi complains because he doesen't want to share his dispenser with the amp engie
GRU:when i switch to gru the boss can still reach me and kill(maybe it's only a my problem )
True but the sandvitch<shotgun because you can deal dmg and you can still move when healing
Maybe a mini crit buff only for the family buisness

1. That's why you should stay nearby your teammates while doing that.
2. It's not the weapon's fault.
3. You are not faster than the hale while gru is active
4. True with that
5. Shotguns should be changed a different way and remove the afterburn attribute to not become ranged pyros from different classes (maybe extra clip size, reload speed and firing speed with more spread and less damage)... same with family business.