I think people are underestimating the potential value of a deep playoff run this year and with the East pretty wide open, a Howard or Horford pickup could not only get us to the ECF, it could also make it a competitive series.
We still likely can't win a title, but this could vault the C's into contender or borderline contender status in the minds of players around the league. That in itself has enormous value, especially combined wth the young core/picks, the coach, and ownership here.