Weirdly, I think we are better off, long term, with Kyrie and Al leaving.
Heck, you could even make the argument for the short-term.
Running back our team last year is a bad idea. 49 wins is what that team was worth.
Bringing in new blood, plus the space for Tatum, Hayward and Brown to flourish, is value. Strategic use of cap space by Ainge, while maintaining roster and cap flexibility to be ready to pounce on the next big trade opportunity (they seem to crop up once a year) is sound team building.