Having actually played Torghast on alpha, both before and after the addition of torments:
They suck.
They don’t make it meaningfully harder.
They don’t make you go faster.
They are annoying, and they force you to never go AFK.
I got 3 different Torments across a few different runs. One was a stacking fire DoT that my MM Hunter was able to outheal by bringing a Ferocity pet for the 10% leech and just fighting things. I was able to almost keep pace with it just from the leech healing by maintaining Mend Pet. One spawned an add, roughly on par with a nonelite trash mob( but with extra health), which was not threatening AT ALL, unless you were AFK. The third spawned two adds, again basic trash mobs with extra health, again completely nonthreatening provided you aren’t AFK.
If they want to make Torghast harder (and they should, it’s very easy right now once you have a bunch of powers), this is NOT the way to do it.