Very interesting idea's. I mostly like the Season of Nemesis. Would love to scout for a Nemesis, and call my friends when I found one, so we can kill it together. But this will be very hardcore unfriendly I think.
I just wonder if the Season of Chaos won't lag us out.
Good, but season of Nemesis is too op. Blizzard won't do anything like 'guaranteed' for primal. Season of ancients also. The key point is, everyone should get easy access to 6 piece set. However, optimizing all the stats and gears must be difficult -- this is how blizzard works.