Fine.
Valve had me relatively disappointed at the Sniper + Spy update becasue of that stupid bow and arrow. The razorback was that silver lining. Then they announced the Ambassador. It negates the razorback making it a useless unlock and on top of that, as long as it's cooled down, you can score a loving headshot while catapulting through the air. This also promotes spies not doing what they were design for: countering engineers.
Thus, we have useless spies that can't come within 2 feet of a sentry but go for snipers and heavies because they want free kills.
The Equalizer is a direct upgrade from the shovel, it has no downside. It does crazy stupid amounts of damage. If you have 125 health as a soldier you can one-hit a heavy. It's brothers-in-arms in the same update, the Targe and Eyelander, are so out of character of the Demoman it's pathetic. The sword itself receives the brunt of the blame when in fact, it's the Targe. A tiny wooden shield has so much fire and explosive resistance? As if.
Thus, we have Rambo soldiers damaging themselves in resupply and players that never even touched demoman swinging their swords left and right.
All pyro unlocks are ok, excluding the Backburner. Instead of promoting being sneaky they just W+M1 and hope you turn around to run. While on the subject of pyro Valve decided to be stupid and have the airblast, even though it's loving air, choose teams. Air should put out flame regardless of team, also Jarate. It's liquid and air, they don't choose sides.
If there's one thing I can't stand it's the Force-a-Nature. One critical hit at half the amount of pellets kills a light class. 3 shots kill a heavy, 2 a soldier. BONK! is useless because the scout looses any long range weapon capability and the Sandman is too nerfed to do anything anymore.
The heavy unlocks are pretty much balanced.
However, in melee fights, people either take the eyelander, equalizer, KGB, or Axetinguisher. These should not be allowed because they alter a true melee fight. KGB gets crits after a death, Eyelander + Targe modifies health and speed, Equalizer modifies damage and speed, and Axetinguisher needs fire to do proper damage, so they light you and smash you even though it is not allowed.