The deflection point for me on Regulation is purchases vs loot boxes

If the game is implimenting direct purchases, where you buy Item X for Y price then I feel regulation is unwarranted even in the context of harmful levels of purchasing

However if the game is using a loot box system where the play buy a "chance" to "win" an item they desire, then I think that should be considered a "game of chance" like a lottery or slot machine, under which there should be some regulation to require the disclosure of odds, how many times their is a payout, etc etc etc

Diablo seems to use a Loot Box system, not a direct pay system