You know what? I expect that most of the recording is already done; meaning the backing tracks of drums, bass, guitars, keyboards, effects. What is happening these last weeks seem to be "sweetening": backing vocals, strings, maybe horns or the odd guitar solo. You can't really record a Neil Finn album in just three hours and release it in one week
Not wanting to spoil the fun guys!
I'm not convinced of this at all. If the songs are well-rehearsed, no reason you couldn't just record a few takes of each one over the course of a few hours, including rhythm section.
Back in the day, Frank Sinatra would record entire albums in an HOUR, with a 20-piece backing band. He'd knock them out one after the other, only one take needed per song.
But I agree it would be nice to see a rhythm section, as lovely as these choral ballads are, an entire album of that could wear out its welcome.