Dat2U wrote:I think where we disagree is I view Morris as a serviceable rotation player. On the other hand, Humphries & Robinson are basically unplayable IMO mainly to what your favored production tool is piss poor at measuring, defensive impact...
Leave Humphries aside....
Do I want to be in the position of defending Thomas Robinson?

No.... But, vs. Markieff it's not hard, so here goes.
First off, I assume you're referring to wp48 as my "favored" metric. I have no favorite metric. Would you agree that a metric which correlates to actual win-loss records of a team would be the most useful one? If so, great -- wp48 is at 94%; if you have a better one I'm all for using it. If not -- there's nothing to discuss on the subject. I'm only interested in a player's impact on wins and losses.
Btw, I didn't look at either players wp48 before my comparison. I just looked at what was easy to see: box score stats.
Now, if there's something you can tell me or point me to that quantifies "defensive impact," and it shows Markieff with a plus there, that would count against my simple-minded look at box score numbers. But, if you can't -- i.e. if it's just you looking at them as defenders and concluding that one is better than the other, then there's nowhere to go with it even if you are right: how would one know how many points that defensive superiority is worth? If you can't know that, you can't provide a basis of judgement. At least that's how it seems to me; what am I missing?
Just looking at Robinson's numbers last year and Morris's as well (but only his numbers with us -- not saddling him w/ his Phoenix season), I see Robinson getting 9.7 defensive boards every 40 minutes vs. Morris's 7.2. Surely those 2.5 boards have some value in re: defensive impact. He also blocks 1.6 shots vs. Markieff's 1 -- again, that has to have some defensive impact even if not a lot. No?
Defense starts when the opponent gets the ball, and you're at some disadvantage if the opponent got the ball by rebounding a missed shot of someone on your team, right? As opposed to if you made a shot and they're taking it out under the basket. Well... Markieff got 1.7 offensive boards -- preventing that disadvantage on defense -- every 40 minutes. Robinson got 5.9. In other words, every 40 minutes Robinson prevented his team from being at that disadvantage 4.2 more times than Morris. Again... this has to fit somewhere in measuring the value of Robinson to his team's defense -- even though it's not particularly about his own 1 on 1 defensive abilities.
IOW, you may see Morris playing defense and he looks good, better than Robinson, and you think it's a lot better than if Robinson were out there. But on a bunch of those situations, w/ Robinson we still have the ball! We're not playing defense. Just a fact... and it does jump out of the numbers, no?
Now, Morris was by far the more productive shooter -- he took 3.4 more shots than Robinson every 40 minutes, and those shots netted his team 5.1 more points -- i.e. he's shooting 75% on those extra shots! -- but that's not where you said Morris was better than Robinson. (Not that Morris was an efficient scorer for a pf: slightly below average for all players at the 4 last year.)
So there you are. Robinson isn't a good NBA PF, just a better one than Markieff Morris.