I can see why some competitive raiders are a bit worried about BiS gear coming from an event like the Diadem. But remember that the ilvl gap is much bigger in 3.x. Couple this with the changes to materia melding and crafted gear and the start of 3.2 is likely going to be fairly different from what we’re used to. World First raiders have typically bought and melded crafted gear to get a slight advantage, and in 3.2 they’ll have a full set of it available (right and left side).
Yoshi-P also said this about the 3.x series:
I think Yoshi-P has basically tried to solve 3 or 4 problems that the player base has had with past content. They’ve:Yoshida: Since we have some ambitious goals, there may be some content which doesn't work out so well, but we hope to create a new adventure that everyone can enjoy.
Yoshida: We definitely want to bring a different kind of excitement from what was offered with A Realm Reborn,
Yoshida: The launch of Heavensward is building that foundation. It's a launch pad for where we can start our evolution.
"With the 3.X patch series, we're trying to figure out how to bolster the community," he says. "We want to get them involved in something more public and open."
We wanted to give an old MMO-like feel for this one, and for FFXIV it'll be fresh content that hasn't been seen before.
- given us FC content
- given us BiS gear in an odd-numbered patch
- made it easier to gear up alt jobs
- given us content that is more open and unstructured
In doing this they’ve made it so that competitive raiders feel the need to grind the Diadem in order to prepare for 3.2. This might be what Yoshi-P was talking about when he said "there may be some content which doesn't work out so well." But we still don’t know the extent to which the materia changes will shake up progression, so it’s too early to tell if gear from the Diadem will actually be that much of an advantage.
Patch 3.2 won’t bring any brand new content to Exploratory Missions, but Yoshi-P has said there will be some “adjustments” to it, whatever that might mean. But this is a feature that will be expanded upon in the 3.x series. It’s likely we’ll get new zones in 3.3 and 3.5 with new mechanics and features. They’ve talked about sky battles with outfitted airships, actually being onboard and controlling an airship with your group, etc. I wouldn’t be surprised if they borrow more elements from Dynamis and Abyssea in each patch.
It's definitely not perfect, but it seems like a step in the right direction at least.