This modifier effect is interesting on paper but in practice it's annoying, in a very bad way. It sort of soft restricts you from using the full capability of some fighters. Specifically, 'Bella and Beo are negatively affected. Beo's Hype Mode throws are an important aspect of his character, but that first hype throw counts as a knock down and gives the opponent Barrier. Also, Beo's BB3's (and maybe both of 'Bella's, haven't tested Grab Bag) include multiple knockdowns which make them essentially useless because they damage you back. Theoretically, any BB that involves a knockdown could be affected by this. I find it a little unfair in scenarios like the final hit of Three Wulf Moonsault applies Barrier and reflects the damage at the same time as the hit. Especially given the importance of BB3s in this game. I get the idea of this modifier is to make the player be careful about knocking down the opponent, but when many BB3s have knockdowns you can't control, and when BB3s are essentially necessary at higher streaks, this modifier is basically telling us not to use them, or at least not use a few of them, which is basically telling us not to use certain fighters. I suggest changing the timing of the Barrier application from this modifier to be on stand-up, rather than at the same time as the knockdown. This gives the benefit of still requiring the player to be careful about knockdowns as they can slow the fight, but prevents punishment for using certain BB3s that automatically knockdown the opponent during the move.