Almeida/Ayuso is clearly not a productive co-leader pairing. But that may be down to Almeida's style of riding, especially on climbs. He's most comfortable riding his own pace rather than working for or following others.
Agree that Ayuso should go to the Tour as a helper for Pogacar. Having him, Majka/Vine and A. Yates would give Pog nearly as strong a team as Vingegaard/Roglic/Kuss. Or, at least strong enough not to be a liability.
Don't know about the Giro. Wouldn't Almeida do Giro-Vuelta logically? Unless you don't mind having Ayuso and Almeida essentially riding their own races again. Not that it worked out all that badly, but they didn't challenge Jumbo in the slightest.
I'd personally like to see Vine as a Giro co-leader. If he stays upright =and that's a big if -- I think he's got a GT podium in him. Just a feeling, not really based on results.