Sometimes team sports, especially basketball, reminds me of putting together and then playing in a musical band.
You can't have a cast of wanna-be stars all wanting the spotlight at the same time, and expect magic to happen. There must be support in all the right places or the team/band never reaches full potential. You need mates that are eager to support and assist by finding what each member does best and then highlight that. It's all about creating chemistry.
Hayward is a good mate, he looks the floor over well and selflessly gives the game what it needs, when it needs it. I believe the guy could be scoring at the same clip he once did with the Jazz when the ball was always in his hands. Not so with this Boston team, he doesn't need to be that guy, he needs to be a veteran presents and an all-around playmaker.
If Marcus is the heart of this team, Hayward is one of the the straws that stirs it.