So I'm watching Towelliee streaming torghast (linked on the main page right now) and I have to say, this is rental power done right!
It's a contained environment where players can get diablo levels of overpowered, and it's literally one of the coolest gameplay features I've ever seen in WoW!
It's for one TO five players, operative and exciting word there being "TO."
It's possible that the power gain is in a testing state, but honestly, the place is infinite and is allowed to get subsequently harder and harder, *requiring* the contained, ridiculous OP player(s) to progress.
Expansion to expansion rental powers are a huge and valid talking point of much complaint/debate, but I can't help but feel that Torghast may be this concept finally applied correctly! I'm so hyped for this feature now!