I just want to say that Valk's light attack is faster than PK's light attack and the GB and light attack spam aren't really that big of a problem on her. I never get hit by a PKs light attack spam unless I'm in a 1vX. Side dashes and overhead dash attacks are really easy to parry and the light attack spam can **** you when you don't have the reaction time required, but that's it. Also just block to the right at all times when you are in neutral.
Maneuverability, speed, range of attack and high damage is an incredibly potent combination, and very easy to overpower. Throw in a couple of dots and you've got all the makings of an OP class. It lets them control the spacing and tempo of the fight, while also dishing out big damage and putting pressure on with dots that force the other player to abandon defense.
The buff to her range was especially weird. You'll see her be obviously out of range of even her short sword, yet literally teleport into attack range when she strikes. It's laughably OP once you start noticing it.
The thing is, Warlord is arguably the top class at the moment. But that's because of his particular abilities. Headbutt. Throw/push distance.
The PK's OPness comes from the potent combination of core traits: speed, maneuverability, range of attack and high damage. Her powerful individual abilities (bleeds, poison, cancel-able zone into other abilities) are just icing on that big cake. She's just hugely overtuned in these core traits. It's too potent of a combination.