Wow, he's been awful. 90 wRC+ and both Steamer and ZiPS think he's below-average true talent. With his defense now likely below-average in RF, he might be done as a viable everyday player.
The Royals have been acquiring a lot of flyball pitchers and great defensive outfielders, and it's worked pretty well in that spacious park. I imagine they value Dyson appropriately.
He's pretty much the definition of someone who's hard to deal with. When you can't even discuss ideas with someone who doesn't agree with you, you're hard to deal with.