I was a fan of the defence for a while, only one thing noticed:
The one player sticks to opposing teams scorer (in my games ussually PG) and completely doesn't care that SG sinks in casual 40pts.
My understanding was always the best offense player is calculated at the start of the game. The +1 will defend him, no matter what happens. So another player will step up as Option 1. A SG or a SF can score than 40 points or so. There is no adjustment to the new threat.
It's like saying "we will stop the biggest offense threat and let the other do what they want".