I am not sure I understand your question. Niantic told you in the response that the artwork was the submission for the Wayspot, and that you could submit a new nomination. If you feel it is valid as a separate Wayspot, then submit it. If you do not feel it is valid as a separate Wayspot, then don’t submit it.
Trying to “upgrade” a Wayspot in the way you are demonstrating by making it something more than what it is has been defined as abuse. You could include more information about the setting for the statues in the description, but not change the Wayspot to the fountain. Or you could submit the fountain separately. I would guess, however, that it would be rejected for not being “Distinct,” or for being “connected to another Wayspot” as a recent post indicated: Appeal Rejected as Duplicate