So I started to play again. I immediately cranked it up to Torment 10, went to the Act III Ruins for the Cube. It was a bit more difficult than I expected but I managed (no death). It's fun to see those big ice 'yeti' monsters again too (I remember them from Act 5 D2 in the ice cavern maps). Anyway, so I get to a point where I encounter a female Barbarian mini boss (I think her name is Tala?). She 1-shot me so fast I was still pressing skill keys never realizing I was actually dead. I respawn on corpse, she one-shots me again, damn, tough girl. I respawn, pop Akarat's Chmapion, she charges me and I instantly die again.
Welp, had to lower Torment to 8, haha. Now that's what I call a Barb!
@ InfiniteLurker
The Rift Keystones can (and should) be sold to merchants now. There's even a recommendation to do so in the item's description. Since now all you do to go in a regular Rift is to click the Obelisk and choose Rift at the top and it just opens a Rift portal. As for your other questions, well, concerning the pre-2.3 Legendaries, you might want to hold on to the ones that happen to have a Legendary power that you might end up extracting eventually. If not, you can definitely salvage them for the Souls, because some of the Cube's recipes cost a significant number of them (some recipes require 50 Forgotten Souls).