Due to the startup frames, regular parries are superior to CCs, generally speaking. I think if Warden got anything from the side it should be the same as or only very slightly more than the 18 dmg side light combo you get from a regular parry (maybe make it a flat 20 dmg?).
I also think Warden's top guard CC should be a heavy combo instead of a light: 30 for the initial counter strike, then 25 for a guaranteed follow-up heavy (instead of the current follow-up light), that way Warden has the potential to execute from a successful CC. I'd take this over side CCs.
Also, in tangent, Warden should be able to dodge cancel (any direction) the top UB finisher.