He can't copy it due to irratic movements that DP makes, he states this after he learns that he always dodges to the left. He beat Taskmaster with both arms and legs bound, because he knew he could. Slap Wolverine in the same situation, would he of faired as well? Doubtful.
DP's technical fighting ability is most likely not top tier, what put's him there is sadly his irratic and crazy behavior. He really doesn't have a fighting style, he just does what he does on the go adapting to whats needed.
We want to talk about healing factors being gone in their fights, non clear wins, etc. What about DP being distracted by T-Ray and the want to fight him, losing his mind, having halucinations, on top of attempting to piss wolverine off as much as possible to make it a good fight. He still kept the upper hand.
Fighting a mechanically alter Ajax who surpassed him in all abilities?
Shows tactical abilities there.
Being said to be one of the best their is by Taskmaster, who knows far more than enough fighting styles.
Like it or not, it states highly of his abilities.
Add that to the fact of his arsenal, speed and agility to easily match wolverines, stregth, better healing, inability to ever stay down, on par fighting ability and teleportation...he takes the majority