I usually don't divide paphs unless it's absolutely necessary, i.e. if it has two pronounced "clumps" with very little in between them. Sometimes they will also "fall apart" on their own during repotting. The general rule of thumb is that each piece should have 3 growths and a good root system, but sometimes that is not always feasible.
Your plant appears to have two clumps that are separated. I suspect that it may divide itself if you were to repot. But I don't think you absolutely have to repot. If the plant stays in one piece, or if the roots are inadequate on either piece, I'd lean towards keeping it together.
Sometimes plants that don't bloom may benefit from repotting. The mild shock may cause them to bloom. I know people who say they bloom Delrosi, a notoriously reluctant bloomer, by repotting several times a year. (I say just buy one of the newer ones with delenatii as the pod parent that are much easier to bloom).