Ainge knows he isn't making a big trade. A smaller deal, upgrading the bench, could help for this playoff run.
As I see it, the Celtics are likely to be the 3rd or 2nd seed. This means they wouldn't have to face the Cavs until the Conference finals. Although they would still have to face possiblythe Wizards, Raptors or Hawks, avoiding the Cavs until later rounds may make a run into the finals more plausible than in the past couple seasons.
If the team can add defense on the front court, it might help protect Isaiah and a deeper playoff push. A player like Bogut, even though rumored, still is a good option. Bogut would provide the defense to the second unit missing when the team has to constantly rotate between Olynyk, Johnson and Horford. In addition, Bogut would be able to fill directly in for Zeller, who can't play any defense. It may cost a couple second round picks or we could take our chances in a buyout situation to acquire Bogut, but those assets are not going to jeopardize the team's future upward mobility.