Fabled?

[Daldaen]

If they are going custom content I would favor things that existed in Velious zones but post Velious

The iksar arc quests. Greenmist, Necro/Shaman/Monk/Warrior arcs to full completion.

The shawl 8th quest.

Vulak ring event.

Idol of Rallos Zek.

Shard of Hsagra's Talisman.

Focus effects added as they were in Luclin.

Flowing Thought stacking.

Basically just give me luclin, one of the EQ expansions.

Things like that, where Luclin improved hugely on Velious content after it was current.