Well as I expected thinking about the TA yielded great results ice skating today. The biggest noticeable thing to me today was not the dorsiflexion, but the inversion of the foot. It helps me to get to the outside edge, or just to keep the gliding skate perpendicular to the ice.
Inversion is a counterintuitive word as it moves the ankle out, not in (the term refers to the bottom of the foot pointing in, with eversion the bottom of the foot points out.)
In skiing this should assist with minimizing A-Frame and with increasing tipping of the inside ski. A lot. What do we do to tip that inside ski? Move the knee? Tip the ankle?
Now there's a muscle, a focus to what creates that movement, and yes it does impact ankle closing (and opening.)
As I land on the new gliding foot I activate the muscle, this helps to land initially on the outside edge, and then to keep the skate from rolling in to the inside edge. As that skate becomes the stroking skate the muscle relaxes and it tips to the inside edge.
So much of expert skiing involves that inside ski. Leading with it. Tipping it. This muscle and developing proprioception of it and utilizing it I expect to be extremely helpful.
I wish I discovered it years ago!