I think DA believes he has a chance to land Hayward, just like he thought he had a chance landing KD, so I don't think there is a "wink wink nod nod" agreement, for Hayward it definitely makes more sense for him to stay, we'd have to go after him really hard to have a real chance. But anything can happen between now and summer. DA staying put is more likely because there's no good deal rather than betting on Hayward coming this summer.
I do agree we may need to move Crowder if Hayward joins, but we don't have to do it now, we can wait after Hayward joins and see how things work out.