Timers can be a thrill in games, but they can also be just plain annoying in too large a dose. For many players, Battle for Azeroth was also that measure full, as there seemed to be mechanics at every turn that rewarded moving quickly. Mythic+ dungeons? The higher key is only available for the right speed. Island expeditions? The enemy team doesn't sleep, so collect more Azerite, please! And in Disturbing Visions, you're constantly losing health, so hurry up before you go crazy. Looking at these examples, it's not unbelievable that some players are looking forward to Shadowlands - or rather the endless Tower of the Damned, Thorgast. But the developers give the all-clear. No rush in this part of WoW Shadowlands: Torghast comes without timer mechanics like in the Vestrous Visions. Source: Blizzard
While dataminers have found a resource called "Vitality", which is reminiscent of mental health from Disturbing Visions, it is not supposed to be active in the finished game. Community Manager Phaerix clarified this on the Blizzard forums. "Please be aware that not everything that shows up in datamining actually exists or is a final feature, as Shadowlands is still in development," he also stressed in this regard.
The one thing to fear in Thorgast is the Tarragrue described in the official preview. This murderous colossus sets out to find you as soon as you die too many times - that's right, your death isn't immediately the end of the outing. Instead, this monster trudges off at the beginning of a level to reach the other end. If it does, your run is over. If he catches you, it's over too. However, there are supposed to be ways to temporarily slow him down.