If you could count on any of Brown, Wicks, or Horton throwing 100 innings next year, I'd probably lean improving the offense. But realistically that's just not the case. A top 50ish starter, acquired from our surplus of bats, is a much neater upgrade than paying market value for the non-Soto's of the world.
Don't count chickens, etc etc, but projecting just 3 fWAR a piece from Dansby/Nico/Happ/Suzuki/PCA, which is mostly conservative, gets you a baseline of 15 fWAR that would have put you 18th in the majors last year just from those 5. Then you factor in Busch, Paredes, maybe Bellinger, non-black hole production at catcher, and that's before the stable of top 100 bats knocking on the door. It's tough to get to an elite level, but it would be tough to get to an elite level without a Soto (or Tucker) level addition and it doesn't seem all the difficult to get to 25 (7th in baseball last year) with what we have. On the pitching side, give me Steele, Shota, and a Mariners starter to go with Taillon as your top four and let one or more of Brown/Wicks/Horton break out in limited stretches next year.