Even if there will be more that will recommend him to play, it's still up to the team if they will add melo.
The team management knows better as they are the one who will pay for is salary and therefore they will only get Melo if they think Melo is still an asset or a great contributor to the team, but it seems like nothing has happen, Melo still hasn't signed any team.

I don't know if he is the one making it hard for a team or it's just that no team is really interested.