I think the maul is already too slow weapon it can be outspammed easily, so in topic of balance i think it should be like it was before.
I have a 100 speed 1h sword, and 136 1h wpf. Try as I might, I can't "outspam" great maul, mallet, or maul users. If they execute a side swing after blocking my swing, it will always land before my followup "spam" left swing does. Now, if they try an overhead while I am "spamming", I will probably hit them first, but most maulers have the sense to wait until I am block stunned before attempting an overhead, or just rely on dragging it along the ground after missing the overhead to hit for full damage. Basically a mauler has all of the tools available to any other 2h duelist, plus crushthrough.
Long Maul is a different beast, and anyone with a >90 speed weapon can easily "spam" them, even if the long mauler is sideswinging. Long maul is thus totally balanced, since they are a devastating support weapon, but stuck on the defensive once they have to block once.