I've been having fun with it, about 15 hours so far.
My only complaints are when people vault over stuff, or climb up ladders/rope, they can start firing their gun way too soon while they're still halfway through the animation. Hopefully they fix that by adding a delay so you have to be fully over the object or off the ladder/rope to use your gun.
I mean, technically a trigger could be pulled while vaulting, its just your aim would be terrible, though perhaps less bad with a smaller firearm like a pistol.