Tinsley doesn't count IMO. He's roster deadspace. With that said, I doubt we're afraid of having 4 PGs on the team. We did in 2003-2004, for example (Tinsley/Johnson/Anderson/Brewer).
I think they'd be crazy to not sign this guy. He looks like he's at worst on Diener's level. I suspect he'll be better than Travis. Not sure HOW much better.