Premium Mini-dungeons in EMS.

So what if i'm level 200?
I didnt use this event to get to 200, i was 150 with 3rd job <.< EMS was stuck with grim phantom watches as the best grindspot for 1 year.
The only thing i've used the PMD for is to get rare items. I enjoy grinding and i simply refuse to grind with these EXP rates, but i in no way find it game-breaking.

And no i really don't think 20x breaks the game.. especially not when it's for 3 weeks and after that it's back to normal.

Edit: And if what above says is true, then you had 21.6x exp too.
Edit2: Ok, you didnt have 21.6x, cross that.

It won't be for 3 weeks. It'll be back again, and again, and again. You overly indulge players once, and they will want more. And more. And more. This is why GMS has some very broken events.