Stats and math period haven't ever been my strong suit, but gotta bring it to hang with the likes of you, my dude.
I agree - to an extent and tentatively.
But I'm more pre-disposed to thinking that Dev has had this type of role both encouraged and relatively forced upon him. Guys like CP3 and even Barnes, Sochan, et al can't create their offense possession after possession (at least anymore). Devin is basically being asked to be a creator that he really isn't. He's got limitations, and he wasn't able to use this off-season to expand them or at least improve where he's best.
Things that piss me off about Devin usually don't directly involve Devin is my point. You rarely see the coaching staff - even with Mitch in control - doing things like running him off Reggie/Klay/Rip style baseline or backscreens, for instance. Instead, it's always some type of dribble hand-off at the wing or top of the 3 point line expecting him to do something with it. He should be a guy who we repeatedly run off screens to tire people out. When he's not injured, they basically don't limit his minutes in a meaningful way, so they must trust his conditioning (the coaches, that is). They should be using that as a weapon in a more efficient manner, basically.
When you give him the ball at the top of the key asking to create, it's already stacking the odds against a favorable outcome. He should be Rip 2.0 and they want him to fill more of a Manu-type role. Just ain't happenin'. That's not DV's fault, really. I think, in a vacuum, that's also why his +/- is so bad. When Wemby goes to the bench, they run the offense through him
as a ball-handler for 3-4 minutes straight at times and that's where we run into trouble.
Well, I always like to remember the +/- king Matt Bonner. Not exactly the most effective player, but for some reason, having that stretch "5" next to Timmy paid dividends. Yet, Bonner barely passed the eye test for such eye-popping plus minus #s. Long story short, I think it's a reflection of how basketball is a team sport and even moreso, a game of runs that tends to be won in the first half or even first quarter on some nights. Castle had a career game basically (considering the compe ion) and was -14 two nights ago vs MEM. There's no way I see his stat line and what he did in the 4th and think he was a net negative.