I'm not a fan of the change either, especially, as some people have mentioned, with chambers. Chambering an incoming lance and hitting the rider with the rotation nerf is not reliable at all.
In regular melee fights, the change is not that big of an adjustment, but it does make an already slow attack even slower with having to hold your attack to aim.
The stab change was fine, 2h stab was ridiculous at times, but, if possible, overheads should be reverted back to their old way.