You're right, his skill-set is much like Roy Williams' except I think Roy's hands are better. But, for me, that's part of the appeal. If Williams were to get hurt, Jones would be a decent fill-in for him. Not to mention a lineup of Witten, Bennett, Williams and Jones would be a red-zone nightmare for opposing defenses.
But I'm not locked-in on Jones.
I wouldn't mind the team sending a low-round draft pick to the Bills for Roscoe Parrish. He'd provide the receiving and return element that this team sorely lacks. The 'wiggle' that the current receiving corps doesn't have. The 'wiggle' that's given this team fits defensively for years.
Heck, I wouldn't mind Amani Toomer coming in, although - like a Marvin Harrison - I don't see him simply taking a backup role.
I would rather see another proven option out there among the myriad question marks the team currently has. Which is at least one question mark too many for me.