I think trading Chriss now would be a mistake. He's really young, and he's also relatively inexperienced as a basketball player. When I was looking at Aaron Gordon, his first couple of seasons are fairly similar to Chriss' statistically. I don't think it's incredibly unlikely Chriss can still turn into a plus starter. I'd love to see what he can do playing alongside a quality facilitating point guard.
It depends on the return. If they could get a late lottery pick for him, I'd be all for it. I doubt he could get that though, regardless of this suspension. I wonder what sort of value he'd have packaged with one of our other draft picks in order for the Suns to move to up with that pick. I'd gladly trade him for #8, which is where he was selected. I'd trade him for a 2019 pick from any team that is lottery team this year, even with some protection like top 7, so the pick couldn't be higher than where he was selected.