Agree with OP. The patch preview has too many flaws in it. Interesting ideas, but in actuality they wouldn't really help the game, and likely make it worse. Most of the stuff listed there I just rolled my eyes at.
The core issue is the economy/AH and itemization. For the latter, Blizz is working on it and I'll give them the benefit of the doubt. For the economy, as someone stated earlier, the hardcore AH is actually working pretty well. This is because items are constantly being taken out of the economy, as well as no gold farming. While gold farming will likely never be 100% stopped, Blizz could do a huge benefit to the AH by just making every item BoA on equip. Alternatively, make all legendaries BoA on pickup (and increase their drop rates to compensate a little).
itemization is not the issue. lack of a consistent item sink is - leading to item economy over-saturation.
(and no, item patches, expansion items, and similar bandaids will not fix that, it will only delay the inevitable item oversaturation).
once thats fixed, you will not hear qq about "itemization" because ultimately, items would be fine if there was an item sink - just take a look at hardcore - it has a good item sink (permadeath, and thats not even consistent one!) and people are happy finding/using items you would not even vendor in softcore.
add to that a couple of good mat sinks, random endless dungeons, adjustable monster density and alls good.
binding is a horrible design choice for diablo. it hugely devalues item drops.
boa nonsense - craft a few until you get better than you can get from drops - then forget about it, no longer a sink, plus all ingame drops are now made worthless
the only mode (and i can't stress this enough) where binding on pickup works and is in fact necessary would be ironborn
mode (full self-found, no trading of any kind, no twinking, no shared stash, bind on pickup to a char not account).
it will never work for sc/hc.