TrueLAfan wrote: Corey’s shooting and volume scoring were (much) lower than the other guys there, and he wasn’t nearly as good of a distributor as the other backcourt players. That meant he got his high efficiency by *not* spreading the court or passing the ball. Doesn’t mean he wasn’t good—he was a good, not great shooter (but very inconsistent, as Roscoe Sheed said), and semi-adequate defender. That adds up to a decent NBA starter. But, like I said, the value shown in advanced stats overstates things to some degree. He was a nice player.
He's also not really that valuable in basic advanced stats. During his 8 year peak he averaged around a 1.5 VORP, which would be around the 60th best player in the league most years. That's not bad but this year that's where people like Justin Holiday, Marcus Smart, Brook Lopez, etc are at. So if the main argument for him being underrated is 'hey advanced stats show he was better than we think!' that might not take you that far. (He was also paid like a top-50 player during that time, and was of course injury prone, so his value takes a couple hits there.)
Also to add to your point that even as a volume scorer he wasn't particularly good: he played huge minutes on the Clips and only ended up with about 20pts per 36 during those peak years, which this year would be like 45th and back then (lower scoring era) still would be outside the top 20.
Overall seems fine to keep him as a good-efficiency, decent-volume scorer who didn't really help the offense beyond that and wasn't at least a little below average at everything else. Hard to put a number on that value, but I don't think it's high enough that we should talk about him as 'underrated.'