I'd be OK with this and I don't think it would necessitate Marcus Smart money. It would be a fun team to root for again, hopefully he'd be signed to a contract that is tradeable if needed, and also hopefully he'd rebuild some value so he'd become an actual trade asset giving us more options in improving our roster.
I know people are saying the ECF has gotten better and they are correct. But I don't think 23-year-old Rozier, 21-year-old Brown, and 19-year-old Tatum hit their career ceilings in the 2018 playoffs. I think they had setbacks with Kyrie & Gordon back in the lineup this past season, but we would see a future Celtics team certainly better than the 2018 ECF team if that was our core 1-3 going forward. Yes other teams are better too, but I think we'll be right up competing with them.