There's nothing wrong with World Bosses right now.
Everything is working out as Tynon has said they would be (with the caps).
You don't want to get 6.25b boss? Don't start attacking until 10mins into Banish.
Done.
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All of you are in the same alliance, correct?
All of you follow orders during GWs, correct?
Then there's no reason not to follow a guild mail saying not to start hitting after 10mins into Banish Events.
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People will hear what they want to hear, and believe what they want to believe.
You want a solution to your problem? I gave one.
Ask everyone in your guild not to attack until 10mins into Banish. Done.