I find these best unlocks they given us so far, what is so wrong with them?
Well, I judge them from a 6v6 point of view.
The air crit shovel is amazing, I give you that, but it's just a for fun pub weapon. Same with the stomp boots.
The new shotgun is a less versatile shotgun that just promotes using shotgun against players that jump in. I wouldn't mind faster weapon switch though.
Riding crop is overpwored. Basically, just whip your medic or scouts at the start, and you will have a rather large advantage in the midfight. Depending on the speed bonus it might be useless though, still straight upgrade from shovel.
Rocket launcher, mehh.