Yeah, like nobody scrapped the second expansion and turned it into a DLC. Or delayed the appearance of Themes with 10 Seasons? The reason why they placed D3 into maintenance mode for so much time was that they thought D4 will be enough of a cake for the aRPG player base. And now, suddenly, we get a blog post about incoming system updates - well, seems like D4 won't be a cake at all, and D3 has to be brought back from the grave.
Clear illustration that Necro was not a big success for them and smart patch notes beats any DLC.
I think the recent blog post about the continuation of the D3 support (hinting at "system updates") means they are bringing the best Season Theme for Blizzcon. Will it include set items redesign, core changes to item hunt (new tier maybe?), changes to paragon system, redesigned item stats? We have to see.
But one thing is certain - they finally started walking in the path of understanding what their very own player base wants. Where this will lead us? We have to see.
WoW Classic is huge success - maybe they will analyze the data from it and apply the philosophy of prolonged item hunt to D3 also. This can't come without core stats redesign and punishing of old dedicated grinders, but let's not forget the majority of these grinders cheated at some point. If you have to sacrifice 1% of the legit grinders to get rid of all the nonsense in D3 and bring back all players who left in the past, I think that's a trade you have to make.
We shall find answers in Blizzcon. I expect they'll finally announce MTX (cosmetic, stash space) coming to D3 there.