Boston needs movement. In 2024 Brown will surely demand a Supermax, and Boston can't pay him that much under the new CBA rule. They should get players on the same salary line as Jaylen's current contract. With Trent and Grant they ensure defense, intensity and good 3 point shots. They fit perfectly into the Celtics culture. Grant will probably leave because I don't think Boston will offer him what he asks for.
With Ricky Boston ensures a good PG capable of assisting, directing and attacking the fucking defenses in areas that Boston does not know how to do it.