This sounds dead on to me.I think he meant there's not many long term COMMITMENTS. This is clearly a plan to keep the team competitive while the young'uns develop and start feeding the MLB club. You do that by NOT shelling out long term, expensive commitments to veterans, but to sign a bunch of them to very short contracts. Rinse and repeat until the kids are ready to roll.
I have no idea if the 2023 Red Sox will be any good. If things break right (which includes the team having good health) then they could be very good. If things break wrong they'll be a disaster. Most likely it will be something in the middle, and we will watch a reasonably competitive team during the 2023 season, while the prospects get another valuable year of development.
As for Duvall, lots of RHH have a fun time at Fenway for a bit. Duvall has a history of competent defense, including 115 games in RF, so his offensive contribution might be less significant than plugging a hole out there. Has there been any chatter of where they expect him to play? I don't love the idea of moving Kiké off CF.