In my opinion it's not another EQ perse that folks are jonesing for, but rather the notoriety, respect, and entitlement they enjoyed in EQ. No other game has since reproduced that.
There are certain things that I miss from EQ that I wish mmos had, racial hatred and dynamic factions. Roll an Elf? Hated by Ogres. Roll a Dark Elf? Hated by Elves, and so on. Doing quests to gain friendship with a particular group that's KoS to you and opening up quest opportunities or new areas, and so on. I really miss that aspect of EQ. WoW had some of it, but it felt forced and seemed to have been integrated into the core progression. In EQ it was a side thing, and although Kunark expanded on it, it was so cool to meet someone who was friendly to a faction you normally hated.
But the thing about EQ that I miss the most which no other MMO has been able to reproduce since, is the feeling of importance I enjoyed. Getting whispers for help some place, people inspecting me and checking out what gear I had. I remember getting efreeti boots and the many people congratulating me. The first time I evaced a full group where everyone had a sliver of health left in Seb, and so on.
The death penalties, the grind, the drop rates, they all created a divide between the haves and have-nots. It was a game that rewarded risk. There was no instance running into Lower Guk. You wanted to have some of that pie, you had to invis/camo or something to get through the place and find the spot and hope the party had a spot for you, or coordinate with groups remotely and work your way down. It took major balls to do the things people did in that game and you gave respect. I mastered some crazy kites towards the end of it all, but I never quite mastered kiting a room, it was just not possible in my mind. After witnessing a wizard do it over and over (working on AAs) solo, I had to respect that guy. Personally, that was the "genius" of EQ. The shit people who had the nerve, the wit, the balls, and patience to do it and get away with it successfully. EQ created divides between people. Some folks just didn't have the time and patience to sit on a random camp for days hoping for a particular mob to spawn, or the dedication to level all the way through, or the nerve to go some place where death was on a stick but the rewards were awesome.
In modern MMO's, no one gives a shit about you. You're just another number. DPSer #129480. You're just an exact copy of all the other ones of your same level. Someone have something badass you don't have? Just a matter of time before you have it too. Join a group in a modern MMO no one even acknowledges you. When certain people would join my group in EQ, I immediately snapped to attention and it was "Yes, Sir!". Why? Because they knew their shit and they did stuff that I didn't have the balls to do and wasn't willing to risk.
And that is what modern MMOs are missing.