No need to ban them in the first place i doubt that tiny little sticker makes any difference at all power wise.
If they want to stop bats getting out of hand power wise they need to get stricter on the size/width of the blades.
This sticker isn't going to make much if any difference to a player.
1) It won't stop the edges.
2) It won't change which direction it hits it.
3) It's not going to put any more power into the stroke, the arm muscles do that.
The only thing it might do is stop the bat splitting in half after say some yorkers.