My gosh... "We want Ladder! It will fix the game!" "We want SF! It will fix the game!"
They are trying to reduce the influence and the importance of the AH. Let's see how it turns out before asking for separate mode >_>
I don't care about RMAH users --- I really don't care at all.
Reduce is not the same as abolish.
The AH serves its purpose. I want to try something new. I want to be as OP as possible as quickly as possible. These are valid uses.
The problem is, it takes the life out of the game. You grind some gold, then you go on the AH and buy gear that lets you sleepwalk inferno. Then you grind more gold so you can buy more loot so you can do MP1. Rinse, repeat. This may be fun for some, but not for me. I want beating inferno to be an actual challenge, like it was in hardcore early on. I want there to be a purpose to getting loot beyond, "hey I can crank MP up one more".
SF extends the period where the game is actually a challenge.
Well then, don't use the AH.
Go play through the game normally. Certain monsters (boss I assume) will drop a guaranteed legendary useful to your class on the first kill. With that Legendary, you will be able to progress through the game.
Once you've finished Inferno MP0, go grind gold, use that gold on Mystic to make your gears better. With improved loots, you will find "Smart loot" faster.
You do not need to use the AH. Spend the gold on Crafting or Mystic.
If you think the AH will spoil your gaming experience, don't use it. I use it with moderation and it doesn't ruin the game for me. If someone spoils the game for him/herself, that's their own problem for doing it.