I don't think they want, really.
Boosting generates a lot of gold to some people, from people who probably buy tokens to pay for it. People "exploit" seasonary game things like the mission tables, which means they are logging in multiple times a day, throughout the whole expansion. Trust me, the devs very well knew the impact of that gold. It wasn't a mistake. Twice in a row. (WoD+ Legion). At this point it's safe to say they don't give a crap about ingame economy, it's againts their very interest to do so. Which shows.
Waiting for the game to recover is nice, but the devs can do it again in a whim.