Why do mounted receive a smaller factor than foot, particularly against foot? Being hit by a thundering wedge of cavalry must be as disruptive to a front rank of foot as a foot unit, possibly worse.
I get the feeling that this was done to balance cav with dev charge and charging lancer so they weren't too OP.
Trouble is, dev charge cav without lance aren't particularly devastating, particularly if they have no specific melee weapon listed.
From a list perspective we can have a range of cavalry effects from
Dev Charger
Dev Charger, Short Spear
Charging Lancer
Dev Charger, Charging Lancer
Any cavalry that have been classified as Dev Charger only are the weakest of the "charging cavalry" types.
Richard