What follows is a question, not advice...I know near nothing about bits:
I recently switched my mare to a waterford bit. She seemed to be bracing against the plain snaffle, and I had read a waterford is harder to brace against. Based on 1.5 weeks, it seems to be doing well for her. When putting the bridle on yesterday, she opened her mouth and acted like, "Let's get going!" And she doesn't spit it out the way she did with a 2 or 3 link snaffle. I'm guessing it bends easily in her mouth, and the only time I really pull is if she thinks she is racing another horse down a trail. That seems to be so exciting to her that she isn't much interested in slowing without my working very hard at it.
So my questions:
1- Is that a harsh bit?
2 - With regard to the OP's question, would that make a natural progression down in harshness?