I'm not against JR Smith. Sure he has a little Ricky Davis in him but he also has skills and experience. It also takes away a role player from the the most dominant team in the East. He provides shooting as well for those tired of waiting on Hunter and Young. I think it would come down to a few things.
1. Money (must be under 12 million)
2. Years (must be 1+1)
3. Can I move Hunter or Young for a first or high second.
I think if you add him he gives you a stronger offensive small ball line up as well with IT, AB, Smith, Crowder, Hordford. There is also a much better top nine guys (no offense to Brown)
IT, AB, Crowder, Hordford, KO
Rozier, Smart, Smith, AJ
After two years you have IT, AB, AJ* and Smith all off the books to target another big FA. At the same time hopefully Smart is hitting his peak with Rozier and Brown coming into their own as well. It's a decent 2 year plan especially because right now this team isn't setup with a good enough bench for a deep playoff run without adding another vet like Smith.