Guild Wars 2

Personally wasn’t a huge fan of UW,FoW,DoA simply because I found them kind of stale and un-engaging. Not to mention the time they took, especially if you hadn’t done them before, was just insane. I think FoTM is as close as you’re going to get.

I would actually be in support of them adding longer dungeons in a similar style to Urgoz’s and The Deep. I thought those two were done really well and delivered a decent amount of challenge with a better progression style than UW/FoW

That being said I don’t think it will happen. GW2 dungeons can already take a fair bit of time and Anets intention is to provide content that everyone can enjoy, which includes more casual players.

You could always try Flame Temple Tombs if you haven’t already done it?
It’s nowhere near the scale of UW and it really doesn’t take all that long but it has a different feel to the duneons.
http://wiki.guildwars2.com/wiki/Flame_Temple_Tombs