As I posted a couple weeks ago , Belichick has a history of not making trades for older players at that age with 1st rd picks. He values the draft a lot as we have seen. If he did make a trade for Jones it would be a 2nd rd pick. It wouldn't be for a 1st I'm sure. But with him in rebuilding mode (he signed young WR's and TE's) and a young drafted QB I can't see him going big for Jones.
By the time Mac Jones is fully ready in his 2nd or 3rd year ....Julio will be 34/35. He'll be the tail end of his career. Hell he could be at tail end right now given last years injury. The guy has 13,000+ yards on his body at 32.
I'm kinda happy KC isn't involved in this. Sure next year they will way more cap room (close to $20+ million right now) but they don't need Jones with who they have at WR right now.