Eh, depending on the design space, maybe not. This is tricky.
I can think of a ton of DB-like weapons that will be powerful counters to DB but not as serious a threat. Really you could “fix” DB by splitting its function: If it “just did barrier” it wouldn’t be so threatening. If it “just did AoE damage”… it’d still b ea monster, that’s probably the biggest problem.
So what if we had a series of weapons that charged relatively quickly, did no damage, but did party buffs. Submerge shuts down DB. Mana Drain harries it. Mana Burn destroys it. Silence would also be effective. We have so many things we could do but can’t because there aren’t generally-useful weapons that do them. There’s new ideas for weapons such as “there’s no mana effect but it regenerates”, etc.
The feedback is two-way. If these weapons are good vs. Dawnbringer, more people will use them. That means they’ll show up on defense and make Dawnbringer less of an “I Win” button. Some Dawnbringer owners will probably switch to different weapons. Thus, we’ll have less Dawnbringer in the pool and a more diverse pool.
It could easily get imbalanced and develop a new, stale meta. Right now, I’d prefer “this set of several weapons is terrorizing the Arena” than “you have to draft to beat Dawnbringer or you will lose”.
Sometimes you want steak but you’ve only got money for Whataburger.