I'm pretty sure they've already finished making the Gubal Library Hard mode dungeon.
And if not, they should be very very close to finished.

Yes, I agree the recent new dungeons were not hard. But, I still enjoy them.

I thought everything was too easy until I tried Savage Raids and Nidhogg EX. Nidhogg EX is tough, but not too bad. At least for me, it's easy to dodge stuff and go where I need.

But I find Savage content to be really tough for me. Especially as the WHM in A5, I am STILL getting used to the timing of standing on the tower.

Have you tried Savage content yet? Do you find it too easy? I haven't met anyone in the game yet who says it's too easy. I think a purpose of Savage contents is giving people a challenge.

Challenge is there. Just need to challenge it!