Remove couching from all thrustable lances.
This really looks good on paper, but I think it would have horrible consequences.
I think nobody wants a surge of jousting lance 9/33 cavalry, but that is what is going to happen if regular lances become unable to couch. That kind of build is already too effective given it's small upkeep (for cav).
Regular lances losing couch attack means jousting lances will be more popular, and with a couch-only lance you don't care at all about strenght, which lets you get 11 or even 12 riding.