Unfortunately this problem is going to be even larger when the charge is fixed for the patch. Right now theres almost no clearcut model for describing how engagements will happen between cavalry and spearmen.

I've sent cavs on a charge at another unit, which was going fine the first 100 yards or so. When they got within 10 yards of the unit, they came to a dead halt for a few seconds, then slowly engaged the unit.

Other times, they get a full on charge when starting from a standstill about 20 yards away. Neither one of those should be happening. So once the charge is fixed, I feel like battles will be closer to they were in RTW...in that Cavalry can simply roll over infantry, and move from unit to unit decimating them.