I would like for them to utilize more content when it comes to BIS gearing and secondary stats. Just having the 24man pieces in the catch up patches being upgradeable with some Savage books or w/e to similar ilvl and different secondaries would be a nice step for some variety and making them less one and done content to high end people.

There's a lot of potential with Criterion and other alternate sources too, if they feel spicy they could even mix in PvP stuff or have things like the EX weapon upgradeable to bit short of upgraded tome weapon earlier in the patch cycle.