The Devs apparently learned very little from the bad aspects of Eureka.

[Ultimatecalibur]

There really isnt any.

This kind of content, if you're going to ilvl cap it, should be at the max level gear for that expansion.

They are ilevel capping it so that level 70 characters will not be significantly outgeared by those at max ilevel when synced up. i400 vs i430 is a much more manageable gap than i400 vs i500/i530.

This also lets them introduce side-grade gear that will be BiS for Bozjan without overshadowing tomestone and Savage gear. Do not be surprised if we get armor and accessories with Bozjan Effects similar to what Hydatos introduced to Eureka.