Interesting. Trading away Crowder, Rozier, and the #37 pick for the #8 could be intriguing for both teams. Assuming we draft Fultz and sign Hayward this is how I see it:
Crowder
(C's) This sheds some contract for us in our quest to land Hayward. This also allows Brown the playing time needed for his continued development.
(NY) Jackson has gone on record to say how much he likes him. He would be an easy replacement for the "soon to be dealt' Anthony. He has has multiple years left on a below market price contract.
Rozier
(C's) This too sheds some cap space to land Hayward. Rozier's departure opens up playing time for Fultz. Not to mention that a concern has to be him taking a backseat to Faultz and then losing both playing time and trade value.
(Knicks) This is a nice fallback option to have at PG, assuming they would've gone with Smith at #8.
Olynyk, who's 7.7m cap hold is a hurdle to land Hayward, is in all likelihood going to be gone regardless. Markannen is a better shooting, more athletic version of Olynyk, but with similar weaknesses. That said, the amount of open looks he'll receive playing alongside Thomas, Horford, and Hayward is downright scary. This is a knockdown shooter, with a high release point, that shot 42.3% from college 3's. For comparison, during their respective college careers Olynyk shot 33% and Kaminsky shot 36%.
It's a definite plus if we're able to replace Crowder for Hayward, Rozier for Fultz, and Olynyk for Markannen.