In a hopes to the fill the void that is waiting for the next life series to be announced, here's another theory on Past life
Jimmy found out that Grian is a watcher, like fully aware of it.
I theorized earlier that he was based on a convo that I think was episode 5, where Jimmy says "I miss the old you"
Well I'm pretty sure Jimmy has decided the old Grian will never come back. The thing is, Grian doesn't even realized he's changed.
He thinks that just because he doesn't work for the watchers anymore, that he's no longer a part of their nonsense. But he is.
Mainly because the life series itself exists because of deeply he is a watcher. He likes the control. The watchers know, deep down Grian knows it, and now Jimmy knows it too.
Grian hasn't been boogy yet because the watchers want him to admit that he's just like them. As the saying goes, you can't have your cake and eat it too.
However Jimmy doesn't care if Grian is in denial. What matters is he's still playing their game. Jimmy has experienced first hand the games of the watchers, and he's hoping, maybe, just maybe he can put an end to it.
Also links onto why scar and grian had such little interactions this season. Neither the watchers or Jimmy want Grian to influence Scar, not to pull him closer or away from the grip of the watchers.
While I think Scott is in a really weird kind of limbo with the watchers, I don't agree with the theory he's the most hated. I think the watchers find him the most interesting. Chaos incarnate but working from behind the scenes unless forced otherwise. Hence why they constantly make him boogy, to force him to act. Scar is their favorite because they don't have to make him do anything. Scar is scar. Crazy in a way you think he won't succeed. Yet he always does.
I think if Scar were to be 'randomly' paired with Joel, aka the Scooby doo villain of Minecraft, he'd be given opportunity to pull some very, very heinous acts, much like what I think would've happened if scar paired with Ren in third life instead of Grian.
But back to my main point. With Jimmy distracted trying to take down Grian, he won't be paying attention to the next gen of watchers: Joel, Scar, and Scott. AKA, The Shooting Scars. Bc all of Joel's plans usually fall, like a star. Scott is an absolute star (gem and the scotts reference-), and of course literal hot guy scar. I was also thinking Scar and the forces of Evil (svtfoe reference)
Man this was long- sorry for ghosting for 19 billion years