But why 2+ days per week? It feels like you're really limiting your pool of candidates when you insist that people come into the office multiple days a week. Why not try an "innovation week" once per quarter to get that work done, and ad-hoc team meetups instead? With the expenses you'd save from ditching the office lease, you could run a lot of social events for employees that serve a similar purpose.
Not trying to criticize or change your mind -- I'm just curious how you came to the conclusion that hybrid is the answer, since it sort of feels like the worst of both worlds to me.