PJ Tucker out 6-8 weeks with injury....they could use a SF with Warren coming off serious injury and now Tucker going down possible straight up deal or 3 way opened up.
Still not a fan of Knight. Advanced stats hate him, and I think we'd rather see if our low risk/high reward investment pays off (Lawson) before making that trade. If Lawson bounces back, we just created a log jam in our guard rotation (Collison, Lawson, Knight). You didn't say Knight specifically in your post, but most PHX trade proposals end in a Gay for Knight type swap. To be honest, I'm not even sure Knight is an upgrade over Collison.
If we do end up making a trade involving Gay, I'd like to see Koufos included with a cheaper C, an expiring C, or no C coming back. We're not really going to get a prominent scorer in return for Gay so I think the best we could hope for is a young asset/pick. For instance, if we moved Gay & Koufos for Korver, Splitter, and a lottery protected 1st, I think that would be a pretty good return. You free up $8 more million next year to be spent on another position of need (considering we have the best C in the game with 2 other players on rookie deals who can play C), you add an elite shooter & good locker room presence who should make Cousins' job easier on offense (It'd be interesting offensively to see a Collison/Afflalo/Korver/Casspi/Cousins rotation or a Collison/Korver/Casspi/Tolliver/Cousins. That's a s*** ton of spacing for Cousins).
It's obviously risky considering the scoring production going out, but if Lawson is looking somewhat close to his old self, we may be able to get away with Collison, Lawson, Afflalo, & Casspi being the secondary scorers to Cousins.