The offense must be addressed and that's going to be very difficult given this roster's lack of flexibility. I see a couple possibilities.
You snag Bregman and that let's you dangle Shaw+ for a Joe Ryan type
You snag Alonso, deal with Seiya in RF and that let's you move Ballesteros for an arm maybe a Bryce Miller/Sandy Alcantara type. You still have Caissie to take over RF in 2027.
If you deal either Shaw or Ballesteros for an arm, you can then move Taillon to open some salary and at 17M he can probably bring back either a reliever or a prospect or two that slot in the 10-15 range.
They need a legitimate utility infielder from day one. You cannot go into 2026 throwing an array of Nick Lopez, Vidal Brujan and Jon Berti out there.
I'm also going to put this out there and it's going to cause some rage, but depending on how other teams value him, I'd listen to offers on PCA. I know there's basically no one to take CF, but this might be the last chance to sell high. Against I'm not actively looking to move him.