For an mmorpg yes because the main point is farming materials to get good gear, but diablo 4 should be an arpg like a Diablo so the main point is farming gear and at max key to farming more gear.
Blizzard don’t need to slow the basic progression, need to slow the endgame.
But the problem is diablo 4 lack of a good endgame and good itemization, so Blizzard clumsly try to hide this with stealth nerfs slowing the basic progression and make the game more similar to a mmorpg.
But it’s useless because when players will reach the endgame they will blast trought it and in this way Blizzard is only helping Gold sellers and Dupers.