Upside, yes. I agree that Jiri can be a great role player. But you have to blame Paxson on this one. Terrible, terrible acquisition for us. I don't understand why we needed to get another white, 6'7 slasher/shooter. If this was "part 2" to a trade, what the hell happened to part 1?
I'd give him some time I guess.. let him play in summer leagues, see how he does in the preseason. Re-evaluate from there. His problems aren't his talent, but his mentality.
Really though, if his head is so shot from a few boos, then I don't know if we really want him long-term. Considering the fact that we have Luke that has great court vision, good passing skills, and a great shot, then I don't think we'll ever need Jiri. He doesn't seem like a winner to me, seems more like a pouter. It's great that he has PG skills, but in the mean time when the rookie PG is growing, LeBron can pick up minutes there, no big deal. I hope he's packaged in a trade to get back in the draft, somehow.