if you can, check out some vid of former dodger pitcher Orel Hirshiser. He had GREAT kick leg action and toe action on kick leg. Ive seen a photo of Andy Pettite looking really stiff (landing) and landing on his heel. Great pro but not great mex there for sure. Landing on toe and cross stepping can be nagging habits for pitchers. I see them doing both in the bigs but bigs pitchers have, for the most part, good mex.