I think I speak for most of the community when I say that I'm very thankful the council has come to the decision to take a vote on Swagger's presence in the metagame. Most of what can be said about Swagger has already been said but I haven't really seen a post that sums up the way I personally feel so I'm going to take a stab at it in the hopes that it helps someone.
When I saw the main changes to Gen 7, my first impression was that Swagger seemed like it would finally be a healthy and interesting part of the metagame, with the many Prankster nerfs weakening Swagger for the sake of confusion and the presence of Misty Terrain to promote SideSwag. The element that critics mourned the loss of when Swagger finally left became the more prevalent one, and I was pretty sure it would be here to stay. However, that was when Tapu Fini was regarded as potentially the worst of the island guardians, Snorlax was practically unheard of, and Kang/Jirachi were clearly bigger contributors to the shaping of the meta.
The main issue with Swagger now is the sheer number of Pokemon that can become highly threatening with even one well-timed Swagger, from Marshadow benefitting by stealing the boosts and then attacking, Snorlax needing far fewer turns to become threatening, and weaker physical attackers like Ferrothorn and Zygarde suddenly nabbing tons of KOs. Normal counterplay to setup sweepers in Intimidate, Will-O-Wisp, Taunting the setup user, and sheer offensive pressure aren't possible when Tapu Fini is around to outboost Intimidate, block Will-O-Wisp, and heal up the threat faster than it can be damaged. In this way, Tapu Fini became a threat to Doubles in a similar way that Jirachi did, just not as outwardly so. In order to avoid being thrashed by one of the many powerful beneficiaries of Swagger, players are often forced to take out Tapu Fini as quickly as possible, no easy task when faced with a 70/115/130 Defensive tank with a solid defensive typing and pinch berries to give it a new lease on life once you get close to a KO.
Without Swagger, Tapu Fini clearly is not an issue, as its ability to turn any physical attacker into a setup sweeper without taking up one of their moveslots is removed. The main reason Doubles hadn't been so setup oriented in generations past was the necessity of Protect keeping them from finding room for a setup move, but with Swagger taking up only one slot for the whole team to potentially benefit, the meta quickly took a turn towards favoring obscenely setup-focused teams. Just take a look at some of the teams used in this most recent seasonal, which found success due to their ability to overwhelm foes that were stretched thin to check every setup-based attacker.
However, the same cannot be said for the reverse. Without Tapu Fini, Swagger still has plenty of potential to be a quite frustrating element of the game that has little counterplay. Though this is purely conjecture, I believe it would likely experience a bit of resurgence in its use as a last-ditch check-all in relying on confusion hits without Misty Terrain to block this side-effect. Swagger doesn't clearly fall under any of the buzzwords people typically use to discuss potentially ban-worthy elements of the metagame, but I believe that a metagame without Swagger would be a vast improvement from the current one. For this reason, I'm urging the council to vote to Ban Swagger.