This what happens when you don't play your lottery picks--you and they don't know what they're worth.
Yes he is restricted, but yes we could be forced to overpay to keep him. I personally have been less impressed with DL than some other fans (Burke pick, keeping Ty, not getting Bledsoe for Sap, pa king preseason with scrubs that ate too many minutes un too many games, favoritism of JLIII, and now noy getting Hayward deal done).
Hayward may say he wants to be in Utah, and I want to believe him, but it's tricky. Celtics, Suns, and Clippers are all known to covet him. Celtics and Suns would maximize his talents (instead of rotating him un and out of the game in such a way that causes him to go cold, or asking him to be leading scorer, and leading playmaker for others because the GM decided to draft the one person they didn't work out).
I could see Hayward having a bad year, and still getting offered a lot of money by someone else who realizes how badly we mismanaged him. Scary. Hayward isn't a #1 guy, his ceiling could be like a Scottie Pippen (#2 guy on a dynasty team). I don't see us winning any championships with him as the #1 guy, but I don't see us getting there without him.