Timeline:
8/15/2018: Google reports issue to Epic
8/15/2018: Epic begins investigating
8/15/2018: Epic confirms bug and begins working on fix
8/16/2018: Epic is testing the fix
8/16/2018: Epic begins deploying fix
8/16/2018: Epic asks for full 90-day period to deploy and test the fix
8/24/2018: Google finally replies: "now the patched version of Fortnite Installer has been available for 7 days we will proceed to unrestrict this issue in line with Google's standard disclosure practices"
They literally waited until the last minute to go, no, sorry, we're not waiting, it's full-disclosure time, :trollface:Epic noted in the article that the game won't auto-update until the user runs it. So they clearly would have needed to inform users that didn't play regularly to get the update. However, Epic could have notified its own users when they were ready, rather than Google outing them by default.
If Google had replied, like, 7 days earlier, and said "sorry we're not waiting", maybe Epic could have made different decisions, knowing they wouldn't get the time they requested. It's clear that Epic worked their asses off to churn out a patch. They could have announced within that time if this was properly coordinated.
Whether this was just Google being indifferent to a company's reputation, or an active attempt to penalize Epic for not forking over 30% of their revenue, is left up to the reader. But Google acting in the interest of users is not a defense here, because Google just ignored Epic and then fulldisc'd.