No content will ever suffice for players who play 24 x 7 (I'm exaggerating, but not so much) with the only aim to min/max, never stopping a second to look at the landscape, to chat, to help etc.

The only way would be to make consuming the content so unbearably slow (like, having to walk everywhere, dramatic XP and loot nerfing etc.) that everybody would then quit in frustration to turn to "faster" games.