Not sure I know what the definition of a motion hole is. Is it any hole that is used to impact ball reaction, not needed for static balance rules. Is it a hole designed to increase flare, but not a hole used to decrease flare ( axis holes for example ).
I always lay out my equipment so that I can use a hole to impact the hook shape without making the ball illegal. Prior to the strong asymmetric I often used a hole in the lower quadrant 3 inches from my axis for balls that I wanted to use from deep angles. I more commonly use axis holes to smooth off the reaction of balls, and still often do that with my symmetric arsenal ( my IQ tour became even more versatile with an axis hole ).
Nothing in my current arsenal has a balance hole other than my IQ tour. I also only have one asymmetric in my arsenal ( black widow legend ). I bowl mostly on tournament patterns, and don't really want any so called motion holes.