As a young coach I initially tried the closed chain “ankle drives” and “ankle breaker” mobs. The names are very appropriate as the forced motions at the ankle may achieve improvements in gross movement (dorsiflexion), but the ankle and foot are not just a simple hinge. Things may visually look good, but all the while dysfunctions at the small joints and articulations may remain unchanged, become deranged, and appropriate proportions of contribution altered.
These “mobs” are often prescribed in team settings. In a pool of athletes, how many do you think you’ll find without a history of ankle sprain(s) (and all the direct and adaptedly altered patterns that follow) that possess a talus that rocks, rolls, and glides appropriately but just lacks gross dorsiflexion? Not to mention taking something that’s hypomobile, impacting it and grinding away at end range.