I'd really like to see this starting lineup going forward:
Collison
Temple
Gay
Tolliver
Cousins
Why Collison over Lawson?
I'd rather utilize Lawson's superior playmaking in the 2nd unit when Cousins is off the floor. His playmaking is not as much of a necessity when playing through Cousins at the high post. Also, with guys like Collison, Temple, & Gay who are at least adequate at making plays, it makes that skill less valuable in that unit.
From a scoring standpoint, Temple & Tolliver aren't going to provide much, so Collison's ability to be that 3rd scorer would be useful whereas Lawson is more of a distributor.
Lastly, with guys like Cousins and Gay in your lineup, you're going to need spacing. Collison is considerably better at spacing the floor which should allow both of those guys more room to operate. In the 2nd unit, Lawson should have the ball in his hands more which should negate his lack of shooting more than when he'd be playing off the ball more frequently in the starting lineup.
Why Temple over Afflalo & McLemore?
He's easily the best defender of the bunch and can switch on to PGs, SFs, & some stretch PFs. But not only is he our best defender at SG but he's just our best perimeter defender in general. We should absolutely be utilizing that defense against the opposing team's best offensive wings. Using him against 2nd units is sort of "wasting" that skill.
His 3pt shooting has also been better than Afflalo and McLemore which makes him a very easy 3&D choice for us.
His ballhandling, playmaking, and work ethic are also better than Afflalo and McLemore which puts the nail in the coffin.
Afflalo does have some useful skills. He's historically been a good 3pt shooter and he has some ability to score out of the post. With Cousins & Gay liking to get there's in the paint/midrange, it doesn't make a lot of sense to add another player who likes to do the same thing. Bringing Afflalo off the bench allows us to utilize his scoring skill set more so than if he was having to share the ball with Cousins, Gay, and Collison in the starting lineup. Afflalo could potentially be a guy who could average 10-14 off the bench for us each night which would be very helpful.
Why Tolliver over Barnes, Casspi, Koufos, & Cauley-Stein?
Barnes has horrible length (8'0" standing reach) for a PG let alone a starting PF. His shooting is also dreadful so you're not getting any advantage in spacing, rebounding, scoring, or defending with Barnes as a starting PF.
Cauley-Stein has been a mess this year who has looked lost on he court. He can't space the floor, he can't rebound, he can't pass, and he can't score. His defense has been suspect this year as well. Does he do anything positive on the court right now?
Koufos is great in his role (low level starting C/backup C), but our best player is best at C. Although rebounding is best when he is starting next to Cousins, it decreases our spacing for Cousins & Gay. It also makes it more difficult to rotate out on the perimeter when helping on defense. If Koufos could at least take advantage of smaller players in the post, this wouldn't be much of an issue but he's just adequate in that area.
Casspi would probably be my 2nd choice to start at PF due to his ability to spread the floor, defend the perimeter, and rebound, but his size & strength are concerning to me against opposing team's starting PFs. Also, with Cousins, Gay, & Collison already in the starting lineup, I'd rather have his scoring punch off the bench when we can utilize it more. Lawson, Afflalo, & Casspi as our primary bench could give us 30-36 points a game.
Tolliver, although a subpar rebounder for a PF, clears the defensive glass better than Cauley-Stein.
He's an average to above average defender who can match up better against bigger PFs but he's also athletic enough to guard out on the perimeter.
He provides better spacing than Barnes, Koufos, & Cauley-Stein at a position that brings the 2nd biggest player away from the hoop when Cousins & Gay are making their move.
Lastly, he's a low usage, unselfish player who makes the smart play which is a nice complement with guys like Cousins and Gay.
Minute Rotation
PG - Collison (26 min) / Lawson (22 min)
SG - Temple (30 min) / Afflalo (10 min) / Collison (8 min)
SF - Gay (34 min) / Afflalo (14 min)
PF - Tolliver (22 min) / Casspi (26 min)
C - Cousins (36 min) / Koufos (12 min)
Cousins - 36 min
Gay - 34 min
Collison - 32 min
Temple - 30 min
Casspi - 26 min
Afflalo - 24 min
Lawson - 22 min
Tolliver - 22 min
Koufos - 12 min