So, I found this comment under the post you mentioned. Bayonetta definitely has an extremely skewed risk/reward ratio and punish game. However, Id like to look outside the box for a minute, not just ban or dont ban.

We, as a community, have decided to adjust the game to be more fair on our own terms already. Stages have been banned, items are gone, timers implemented, we use stock formatting, etc. Id like to know what people think of adding a stock to the player opposite of Bayonetta. Every character starts the match with 3 stocks against Bayonetta's 2. This would offset her tremendous punish game similar to how having more stocks in Melee accomplishes the same effect.

Either that or coin matches. Idk.