Why? The alternate leveling is because Eureka has certain elements that break the game. The leveling system is an illusion to make you believe you are in a different time and space that adheres to different rules in which you do with logos actions and the elemental wheel.

Really this doesnt need to be explained if you have been keeping up with the live letters and interviews around Eureka or have done Eureka content.

The dungeon is optional and it is as they said similar to a savage version of a 24 man raid.

Even so Yoshi stated you have to obtain an item to even be able to enter the dungeon so AFKers will need to stop afking and actually do something to enter the dungeon.
Anemos, and pagos are getting a buff in 4.5 so leveling can be easier and getting through the relic will be easier.

Finally the dungeon is related to Eureka story and if you havent been doing Eureka then you can always catch up.

My question is if the OP didnt care for Eureka and we knew a public dungeon was coming in the last area before pagos was released, why complain about it now?