Well if it was PC, I would say it's a non issue, but since it's definitely also PS3, yes, there is a point of no return if you throw too many unique textures into.
Though I doubt that's hardly the problem in this instance. Copy and pasting is a sign of cost saving, not a sign of engineering smoke and mirrors. Especially when you consider they copy and pasted stuff that are not remotely near each other. Aka procedural repetition on leaves is one thing, trees lined up is another.
Simply put they did not want to design another tent, or have an artist move branches and trees leaves around. heck the fact that FF14 is so copy and pasted, even it's map design is copy and pasted shows both a lack of talent and a lack of resources.
There was too much and too extensive cloning this time around to blame it on technical problems. There's no getting around that fact, it was lazy work.