Drop rates and entry item costs for those two areas have been altered to make everything nice and smooth for all the folks who will be working at acquiring this new gear. Yeah, we know that's vague! But Square-Enix didn't say anything specific about the drop rate changes.
It did, on the other hand, specify that the Timeless Hourglass entry item will drop in cost from 1,000,000 gil to 500,00, and the Cosmo-Cleanse will drop from 30,000 to 15,000. That's half off! Nice.