In the LE and defensive worlds, it has often been said that, "A pistol is used to fight your way to a rifle".
The virtue of the modern duty or defensive pistol is its size and weight, which eases concealment and portability. And as good as modern ammo has become, no one would argue that a concealable pistol would be preferrable to the greater power and reach of a carbine.
So it comes down to size and weight. The SAINT™ Pistol offers the virtues of a compact rifle while still being classified as a pistol.
Bottom line is this: You get near-carbine performance in a much smaller package. It's not likely to replace your XD-S® or EMP® as your EDC (every day carry) but the SAINT™ Pistol is definitely more compact and maneuverable than your standard carbine, allowing it to be nearer to you and ready to go when a bigger rifle wouldn't.
And this is the whole appeal of the AR Pistol genre.
This new little brother in the SAINT™ line packs a big punch chambering the .223 / 5.56 round. As for controllability and "pointability", The SAINT™ Pistol allows the user to spread the handhold contact points over the longer length of the firearm. Furthermore, the shooter can enhance the speed and accuracy potential by facilitating a cheek contact point using the forearm brace.
So in the unfortunate event where you may need to fight your way to a rifle, you might instead "fight your way..." to the new SAINT™ AR-15 Pistol.