There are different people working on different things. The people that design weapons and armor probably aren't the same people that do the performance updates. And while they have a couple guest creators for the Nier raids I doubt another stuidio is actually doing all the work on it outside of FFXIV's budget.

Yes, it would be nice if the game got more of a budget, and Yoshi P would probably like one, but he's also not the sole decision maker in SE.

As for what they did give us:

SB pvp weapons (1)
SB Leveling dungeon weapons (5)
Crafted SB leveling weapons (5)
Shire weapons (1)
Scaeven weapons (1) (I forget if they gave us the tier before Scaeven too would have to check, but assuming no for this list.)
POTD/HOH weapons (3)


That's not counting SHB content itself.

So yeah, it's disappointing we don't get dancer weapons for everything. But I also can't fault them for not hitting everything.