Why would either team do this trade?
Utah is set on being serious contenders in a few years once Favors/Kanter get some experience. They just drafted Burke to keep the idea of competing later, not now.
Meanwhile, Hayward and Burke would be a horrendous return package for Boston. Sure they're young, but neither are ever going to develop into a player that even approaches Rondo's caliber - and I'm a big Hayward fan and watched a lot of Burks when he was in Colorado. There would have to be at least two or three first rounders involved in this deal to make it appealing for Boston.