Uh no?
It has -25% damage done and a slower spin up time.
It's fair.
Hell no
Any Scout, Soldier, Pyro, Demoman, Engineer, Medic, Sniper, or Spy caught within fire would have little to no chance of surviving whatsoever without assistance.
Most likely, they wouldn't receive any assistance since the F2P fags have turned the game into "One Man Army Fortress".