I don´t see a problem with even more polygons, BUT if you use that "many", there have to be a lot more details than there are at the moment.
I always give the advice: "Use as many polygons as needed, but as few as possible." If really needed, I don´t see a problem with even 20k polygons, but then you really have to see that there are that many. At the moment it looks as if it could be done with just about 2k, and it would still look nearly the same.