Finding a new home for Story should be the main priority this winter. Eat most of the remaining salary to just get him off the books and open up his spot for Arias. Then find an everyday DH that's a legit threat, rather than just a platoon guy. The team should look like:
C: Rutschman
1B: Contrares
2B: Mead
3B: Durbin
SS: Arias
LF: Roman
CF: Rafaella
RF: Abreu
Everyday DH
With a legit power threat at DH, that team can score some runs (assuming Roman figures his swing out and Arias adjusts well to the MLB). Unfortunately, there's no reasonable way to build a good lineup without expecting some young guys to step up. Ideally get a new backup C, too, to replace Wong.
For the rotation, Crochet, Tolle, Gray, Suarez, and Bennett/Bello/Houck should form a great and deep rotation, but we saw this year that even 8 or 9 legit starters may not be enough to get through the year, so we could use another emergency depth guy (I don't think that's Paez or Sandoval, so idk who). For the bullpen, I don't see us adding more than maybe 1 guy. It was a great bullpen all year and fell apart near the end, but that seems more like overuse and injuries than them being bad. They were terrible this series, but guys like Gamboa and Olds never should have been getting high leverage playoff innings, a healthy Guerrero helps but we need ideally 6 IP from starters (or 5 if Miller didn't fall apart)
The hitting sucked in the playoffs, but a team that focuses on pitching and defense can't allow 18 runs in 16 innings and then blame the hitting. The hitting has to improve a lot, but frankly the pitching was even more embarrassing.