Here is a thought. Mainly a hypothesis. With highly padded carbon shoes, you have less stability meaning the calf and shin muscles also have some extra work to stabilize things. Maybe a shoe with no plate with firmer foam could help the calf issues? Again, just a hypothesis.
this, but also the drop in shoe will make your calves work differently (even with out the spring devices). best to do something more natural, zero drop, or go barefoot on grass/beach sand here and there