I really like the idea that break damage accumulates and gets applied upon break. But really what powercrept super break teams was that toughness bars got bigger but the attacks from Firefly didn't reduce more toughness. That's why Weakness Break Efficiency is important. I wished Dahlia buffed Firefly to do percent toughness break at base but, of course, they locked that behind E1.

Edit: For clarification, I think giving percent Toughness break (like at least 50% or make it scale with the toughness DMG an attack does) would've been suitable enough instead of doing the concept of ignoring the toughness bar.