Quote -
... and even if it isn’t, I can edit the problem areas in PhotoShop. If I do flyover animations, motion will hide the defect.
 

You know you can select ecosystem instances  and manipulate them -eg translate/rotate?
Or you can convert them to objects, do what you want to them and then return them to the eco.
Use 'select ecosystem instances' icon on the horizontal top bar or edit-> select ecosystem instances from main menu.
It shouldnt take longer than editing in PS, and once its fixed its fixed for all future renders or animations.

"I paint that which comes from the imagination or from dreams, or from an unconscious drive. I photograph the things that I do not wish to paint, the things which already have an existence."
Man Ray, modernist painter
http://artpearl.redbubble.com/