From Evernight LV999:
Characters of the Finality Path will be distributed across roughly five different team archetypes, rather than forming a single mono-Path team built around components like Elation and Remembrance. All five team archetypes are existing, long-established playstyles — I think everyone will easily be able to match these characters to those playstyles once they've tried out the Finality test event. These five Finality playstyles will all be tested in upcoming events.
The details of the Finality playstyle are too much of a hassle to get into, but you'll figure it out pretty quickly once you play the event — in essence, it's Pure Fiction's Grit buff externalized into a character's skill kit.
PS: Though I think the Firefly team might end up with a few more Finality characters than the others.(STC*)