I would be excited if the team traded for Cousins, but I'm torn on Marcus Smart's involvement in the deal.
DeMarcus Cousins has his problems, he'll yell at refs, teammates, coaches, reporters, etc. At the least he'd be a concern for any locker room (despite him probably being a very charitable and likable guy away from the game).
But we all know Marcus Smart will yell at refs and coaches too, had gone into the stands after a fan, etc.
If the C's aquire Cousins, part of me thinks having passionate and outspoken guys like Smart and Crowder will help keep him in line. Like if Cousins started yelling at Stevens during a film session, Smart and Crowder wouldn't hesitate to call him out on it. They wouldn't be scared to stand up to Cousins like many of his teammates in Sacramento have been if Cousins gets out of line.
Of course on the flip side, that could all backfire, as having 2 passionate potential powder kegs like Cousins and Smart together could destroy the team. You can find many successful teams with one wild child, but you rarely see successful teams with 2 or more.
You definitely need a strong locker room to get the most out of Cousins, and I personally think Marcus Smart adds to a strong locker room, but Smart also makes it more combustible too.