Beal interests me more than Butler does.
I know Butler is a clear upgrade over any two-way player we have, and, if healthy, probably any player we have period. But a two-way wing is not what this current team lacks. It appears as if Butler's greatest appeal is a) his conspicuous availability and b) supposed ability to attract Durant. Both warrant legitimate interest in an All-Star like JB, but I'm not convinced there isn't a better way to simultaneously improve our campaign for Durant while adding to our current core in the (likely) event that KD doesn't come. Adding Butler without Durant, while certainly a step forward, would not definitely elevate Boston to the level of championship contention necessary to justify his pricetag. That's especially true if we give up two-way players only a cut or two below Butler like Bradley and/or Crowder in such a deal.
My guess is the Wizards have no interest in moving Beal except in a deal that would package Beal + pieces for another superstar to pair with Wall. If, for whatever foolish reason, they would liquidate Beal's value for players and picks, Danny should jump on it. Regardless of his injury history, Beal is the premier shooting prospect in the 22-and-under club. Aside from his potential as an all-around superstar, the Celtics simply need shooters -- and Beal would help tremendously, even if he never makes another leap. He has already proven his ability in the postseason during two separate playoff runs that lasted 11 and 10 games each. He is the real deal.