Except they arnt all corridoors, they are coridoors, they are open expanses, they are stone pillars within an abyss, and as time passes they will be able to add in more, look to diablo 3, there is limited backgrounds and such, all its rift system is is combat, and its what saved diablo 3, making a game that was destined to die, still decently played 6 years later.
also no it really is not perfect streaming material.
perfect streaming material is ones that you can interact with chat and fellow players, while also doing something that people enjoy watching, which well if people enjoy torghast, they will enjoy watching, if people dont, then well they wont watch.
also you dont have to spend 2-3 hours in torghast... you can spend 30 minutes then end.
- - - Updated - - -
You basically just go into the maw and kill mobs, and as you kill mobs there the jailer will notice you and start sending units to chase you down, your limited to how often you can go to the maw, simply by at what point you are banished by too powerful mobs.
runs are not "capped" they are how much you can earn in the maw.
- - - Updated - - -
1. what end game content in the game can you just go "oh brb" then afk for 20 mins?
2. there will be many floors you can just afk with no problem like the shop floors (about every 4 floors currently)
3. well then plan ahead of time "oh i need to go out to do something, so when i get to the next shop i will stop there and do it"
4. 1 run per week is stupid, and being able to leave and rejoin sounds like it owuld not work with dying
5. if you cant dedicate yourself to only 30 mins, idk what you get done in wow. M+, raids, even RBG's all take upwards of 30 mins.