Some other consoles boast the option of editing scenes while on another scene. This could be great being the surface just a controller, allowing the engineer to take the surface offline, load the scene, edit whatever parameter they need and go back to mixing
When using a Venue Profile, I have used its version of preview from time to time.
It seems that most of the time it was to make an adjustment ahead of time to an upcoming scene: Go into preview, recall scene, make adjustment, store, exit preview.
But I didn’t use it enough that its absence on the dLive was considered a deal-breaker.