I think the use of multiple smaller displays is actually quite clever. While I do think a single large display is more flexible, and I adore the work Moog has done with preset management on the One as a good example of what’s possible, I find the Prophet X approach has its own advantages.
It means I can always see the current effects and samples in use as I flip through presets. It allows me to focus on the controls and the screen as a logical cluster that draws my eye with strong visual reminders of what that group controls (I find some designs look too much like an undifferentiated wall of knobs for my liking.) Clusters that include illuminated buttons, like effect enabled state, are right next to information about the effect they control. It also means the main display isn’t changing modes as often, which I appreciate.
Most of all? It feels more like a bespoke piece of hardware rather than just another software instrument.