Scal 100% belongs out there and if you can't see that than you need to wake up. there is a reason why Antoine isn't playing, and Antoine is one of my all time favorite players.
Scal allows better spacing for the big 3 than perk, someone has to follow him outside and leave single coverage for Ray KG and Paul, and if they double one of them then they can make the open shots.
also, as we've seen over the past 2 seasons, Scal can be a reliable smart fill in for Pierce, Garnett, AND Perk.