I don't really think there's any reason for Frontline to be included in these events generally, as there is really no major issue with the popularity of the mode. Queue times are always reasonable with respect to the time of day on populated data centers. Evidently, this event has caused a great deal of harm to the overall player experience in Frontline. This is a huge step in the wrong direction, considering how many serious grievances players already have with Frontline.

Tainting the perception of Frontline right before a new expansion launch also just seems problematic on numerous fronts, and I fear people will think twice about returning to the mode when updates are presented to us because of how badly they've been burned. It's a poor parting gift from Endwalker.