The dream '26 alignment is something like Gunnar 3B/Holliday SS/Westburg 2B/Mayo 1B. If Holliday isn't SS (which is looking perhaps more likely), we could still accomodate all four via Gunnar SS/Westburg 3B/Holliday 2B/Mayo 1B. The question is how to get there and find AB's for everyone as long as O'Hearn/Mountcastle, Santander, and Urias/Mateo are on the team.
Not sure about this year, but next year, I could see Mayo playing a super sub role splitting time in RF with Kjerstad, 1B/DH with O'Hearn/Mountcastle, and 3B with Westburg.
Then in '26 things open up with O'Hearn and Mountcastle gone, as well as Mateo.
Westburg has been impressive at 2B, so I'd really hate to move him. If we are going to move Westburg or Holliday to outfield, why would we move the guy who is already playing 2B at a high level?