I would disagree with that. D3 RMAH was bad because D3 was bad. At that time there was basically no itemisation, everything gear was basically dps/main stat/tr

I would disagree with that. D3 RMAH was bad because D3 was bad. At that time there was basically no itemisation, everything gear was basically dps/main stat/trifecta. D3 was so bad that the fix was to remove trading completely and never been brought back. People traded D2 items for gear, runes and/or real money for decades, there is no problem and the game is alive for well.