I could yes, but wouldn't that be adding unecessary geometry to an already RAM hungry application? Increasing the amount of geometry isn't always practical, especially if it's a scene that's already needing to be optimized because of RAM usage.
Especially when this was said a while back from one of the team "Subdividing the plane does not matter, as Corona's displacement is adaptive and it is calculated based on the max size controlled in the Render Setup > Performance tab."
It also completely defeats the object, these are the issues we were having last time, which we've since been told have been fixed, to the point where the old displacement has been removed. These artifacts wouldn't be visible with the old displacement, yet they clearly haven't been fixed.
To generalise - we've removed something that worked and replaced it with something that doesn't work as well. This is the first scene I've tried it on too, on a really simple piece of geometry. Doesn't fill me with confidence on what I'll find when I'm working on much more complex geometry.