Pyros
<Silver Donator>
Problem of the RMAH imo wasn't so much that some random shmuck could spend 200$ to get that axe thing and own Inferno Act 2(but not act3 because we can't balance for shit yay). It's that the game drops were balance around it, so gear progress was slow as shit with a ton of worthless stats and huge variance and you could go for hours without finding any significant upgrade to your rares and shit.I would love an AH in game. Heck I never minded the real world cash auction house in D3 because I never cared about what someone else has.
PoE has random rares too and 99% of the stuff you find is garbage, but you still get enough decent stuff, and you get currency that you can trade(while gold was pretty much worthless and couldn't buy good stuff in D3 back then, for the most part, you had to find a good item, sell it to a gold buyer, then use that gold to buy good stuff). You don't need 300exalts worth of gear to do endgame either, a lot of builds can do it with like 10-20exalts top, hell some can farm endgame with less than that depending on the build.
D3 RMAH droprates and itemization were pure absolute garbage which really made the AH itself almost necessary for many players who didn't want to spend 16hours a day farming goblins or whatever. And they couldn't really fuck with the droprates without getting backlash from the whales. If you spend 200$ on some axe, you better not make that axe common after, so they were kinda stuck. They could tweak things, but not too much, other than what they did where they said yeah fuck that we're removing everything.