Most of the quests/missions are supposed to be able to be completed within 30 to 90 min, however, the group gear/composition when testing these was usually completed by peeps boxing them at level 90, in UF raid gear or higher, so take all that with a grain of salt. It also seems that unlike the past couple expansions, you have to have completed some of the previous tier/zone quests in order to request some of the higher tier/zone missions, I'm not very clear on what all the prerequisites are, so please only take this as a loose guide, and please update/add to this as we find out more info

FEERROTT -
Rupkerr near zoneline to RM on western wall gives
Quest: An Expedition Gone Awry
Quest: Uncovering the Truth
Quest: A Cursed Cure
Mission: Fall of the Tae Ew
HOUSE OF THULE (LOWER) -
Researcher Breoro just inside the house gives
Quest: The Beast of Rot
Quest: The Beast of the Unknown
Quest: The Beast of the Rage
Quest: The Beast of Horror
Mission: Welcome to my Nightmare
THE HOUSE OF THULE (UPPER) -
Abbit Scribbleetch (+361, -98) gives
Quest: Argon's Memoir
Quest: Abbit's Betrayal
Quest: Never Trust a Morzad
Quest: Dead or Alive or Other
Quest: The Morzad Confrontation
Lilth (a banshee) gives
Mission: Redemption
THE GROUNDS -
Giladan the Botanist gives
Quest: Giladan's Assistant
Quest: What a Mess
Quest: It Only Gets Worse
Gardener Aerhit gives
Mission 1: The Gardener
Barkley gives
Mission 2: Mashing Pumpkins
THE LIBRARY -
Taryln Caelith gives a bonus mission that is T4 toughness/loot (1500+ h/m/e)
Mission: Moment of Clarity
supposedly boss at end has 37.5k AE on max shielded tank, casts about every 8 sec, but if have cleric on other side of wall out of AE LoS, is doable
Mission: The Stuff of Dreams (may have been removed)
THE WELL -
Dtaeml gives
Quest: Down in the Hole
Quest: All Alone
Quest: At Peace I will Be
Traelphor gives
Quest: All is Not Forgotten (part 1)
Quest: All is Not Forgotten (part 2)
Groundskeeper Seamus gives
Mission 1: What Lies Below
Mission 2: No Freedom In Death
Please don't kill me for any incorrect info, but do post corrections/updates/insight

working on rest now