Some of my thinking is influenced by WMA where shock cavalry are much more expensive, and infantry get the benefits of support counted first, support moving, and limited rounds of combat.
It's cool that someone has managed to make a light cavalry army work in WM - but it's not common at all. In Hail Caesar I particularly like horse archers in an army.
A decent set of points should enable multiple strategies, not tip the balance in favour of one over the other.