Good points on Dallas and Butler.
I don't think Boston is an option because I don't think AD would sign an extension there. All signs point to him not really wanting anything to do with Boston which would make Ainge foolish to give up the assets it would require. Which if that's the case and Kyrie walks this offseason that has to be pretty disappointing for the Celtics to have all those assets and cap space with high hopes and more or less end up with Brown, Gordon who is a mystery at what he is post-injury and Tatum.
Lakers could still just give a big haul of Kuzma, Ingram, Lonzo, Hart, Zubac, some picks for filler and N.O. can see if they benefit from a change of scenery. I agree though that that isn't a very enticing return relative to the Bulls or Knicks.
Knicks is who I think is the big wildcard. KP, Knox and some other pieces or if they get the #1 pick then that pick and a package of players. Knicks with potentially say either Zion or Barrett from the 1-3 pick/KP with AD and Durant/Kyrie is really, really tough.
Reading Philly is saying they aren't going to make an offer for the time being.