I don't dislike Aaron Gordon but what is the point of acquiring him? After a hot start, his 3p shooting has really tailed off in December and January (20.5% in 11 games this month!) and despite his athleticism and length, he isn't a great defender. So he doesn't space the floor and he would take minutes away from guys like Brown, Tatum and Morris. When Hayward comes back, he presents another challenge in terms of line-up construction. So its not clear what Gordon really gives them that they really need.
The Celtics main need, however, is bench offense. They struggle to score when
Kyrie is off the court - in fact, they are last in the NBA in scoring with Irving off the court. Williams may be too expensive and the deal may not work. However their primary targets should be either him or Tyreke Evans. I would be shocked if they go elsewhere barring Davis somehow becoming available.