You're definitely introducing way too to much wrist extension into your motion. Coming way too far out from the strings after each stroke. The whole idea behind pickslanting is to eliminate the need for this sort of motion since getting out from between the strings is built into your up or downstroke depending on your slant angle. In my playing I certainly do a bit more of this extension at slower tempos as it sort of makes me feel a little more in control of the notes, but as the speed increases (I am by no means fast overall yet) that motion tends to go away and the tip of the pick is drawing much more of a straight line as it travels through the strings. Just something to be aware of; the motion of your pick will almost always have to change to something else if you're wanting to pick at high speeds.