Set up and play with one line array speaker. Then set a second one up with it. Place them where you can hear one out of each ear.
I'm betting you won't want to play with only one again. BTW this applies to traditional speakers too.
Arrangers are designed to be heard in stereo. Audiences deserve to hear you at your best.
There is the old argument that the audience can't tell the difference. I disagree. I'm done it MY WAY for 50 years and haven't been without work for more than a week or so during that time. I used two 15 inch speakers and a stereo amp at a Piano Bar!
My first arranger on stage was in about 1982 or so and I played it in stereo.
You can do what you want though; won't bother me a bit.