I don't think there's a CF out there to be had but that doesn't mean I'm sold on Haseley for 150 games either. The patchwork is still okay (but works best if Kingery is not your starting 2B, unless you want to count on Roman Quinn).
So yeah I think Kingery probably does still add more value playing multiple positions. Last year when he failed at it the party line was either he just wasn't as good as a Zobrist or a Davis, or the Phillies weren't as good at making him that good. Now he's actually good. Maybe he'd be better playing just one position, but maybe he's actually good enough to continue in this role, and separately from his individual stats maybe he still adds incrementally greater value in this role.
The main thing, though, is he has to play more. Granted it was partly injuries, and less playing time to be had earlier in the year, but he has almost 200 fewer PAs than Hoskins and 150 fewer than Hernandez. If he's going to continue being a multi-tool he's still gotta get the starter-quantity ABs.
I think Cesar could be back but he also might be done if they decide/are able to sign a big 3B bat. Better use of the money. Paying him $10 million to play Kingery's role probably isn't gonna happen, because I'm not sure Cesar is actually good enough defensively to play SS, CF and 3B (and he might not even be as good as Miller).
Nothing is guaranteed, but the risk here is making the same mistake about the line-up that they made with the pitching this year. If Cutch isn't what he was and Haseley struggles and either 3B or 2B is still a weak point you're in trouble, just like having all three young starters bomb was trouble.
Atown's right though, it's more about the pitching. Give me Gerrit Cole, Nola, Robbie Ray (for instance), Arrieta and Eflin and I'm ready to live with no major new additions to the line-up. If it's Nola, Robbie Ray, Arrieta, Eflin and Vargas, no.
Again though, we didn't see Segura or Realmuto coming. There's bound to be a big trade of some kind.