Unclean Beast Threshold...

I took the Unclean Beast for a spin and noticed that for some reason when I achieved 14th level his melee attack speed increased dramatically. The observation was made as I chased down The Torch Bearer. Prior to that experience level and that moment, I had average attack speed; it seemed as if my level 14 achievement suddenly boosted my melee ability. I purchased no items in that relative timeframe (from 13 to 14) and I did not utilize an ability. I did have Unclean Beast`s increased movement speed ability unlocked, but it had already been active some time prior to this... the bonus performance from that was already evident and humble, though noticeable.

I could certainly simply be unfamiliar with the Beast`s attributes/quirks... I do not normally play him. On the other hand, as I said this sudden leap in attack speed seemed unusual.

Anybody else notice such?