here we go again. someone with an opinion he wants to sell as fact as the game SHOULD be...
There is already challenging endgame, torghast is a feature used by everyone. The mandatory soul ash farm should not be some tryhard stuff, just a rather quick and fun chore for the week. To most people it is NOT fun to cc and solo pull mobs etc. Most people are casual and don't minmax/play their char to the full potential etc etc.
That being said, torghast never was challenging imho. It just was slow. CCing mobs and playing careful is not a challenge...
Also when playing beta most players agreed that the first versions were the most fun...where you just stacked powers and went completely ham. It wasnt really hard, it just was fun to build up and blast through.
With twisting corridors we got something like that, for many people the last stages also will be pretty challenging.
Don't want faceroll content? Raid mythic. Push keys. Or push arena even though some would argue that the bursty pvp can be pretty faceroll too atm...