With two subs, two amp channels, and two channels of processing you can run a cardioid or end-fire array and reduce level behind the subs, though backed into a corner that approach is useless.
Art
That is a very often overlooked/misunderstood issue with directional subs.
They need area behind them to work.
I often see "directional subs" that are placed a couple of feet from a wall.
That destroys anything the array is meant to accomplish, and makes the overall sound worse.
But-sadly-many people do directional arrays just to be "different or cool", so they can talk to their friends as if they actually knew what is going on------.
They understand the "marketing concept" behind the idea, but don't understand the workings.
And the "workings" is what is important to understand whether or not you should do it, or just face them all forward.
The ONLY times I do directional subs is when the directivity is more important than the sound quality.
You don't get both.