Cav vs infantry is insanely easy for cav in my opinion. You can easily weigh your risk/reward ratio whenever fighting infantry so that if you get dehorsed, you aren't punished too severely. If you are a shielder and get dehorsed by ranged. If you keep your speed bonus against you in check, you can have your horse take a hit for you while you stab your enemy while he's in the cooldown of his attack.
I use a destrier, so I can go at trot speeds and knock opponents down, too.
I'm not sure how these changes will play out. Just like the title says, it might not even make anything better or worse, just different. It will be interesting to see what it's like, since I play my horse slow but abuse its maneuver. I think cav should just be punished harder for mistakes and have their power toned down a little bit.