One last comment. You should never let criticism dictate your creative chioces, but you should also never let criticism go unnoticed, challenged or explored. One rarely grows without outside influence be it rain or fertilizer.
I agree that criticism should be acknowledged and explored, but not necessarily heeded in every circumstance.
When you get to a point where you obviously know what you're doing--as this artist has--the criticism from others starts to become less and less about "mentoring" on fundamentals, and more about simple differences in artistic vision. Since art is purely subjective, criticism rooted in the latter is of limited value.
My feeling is that, when doing a project like this, the idea isn't to have every last person in the audience think it's perfect, the idea is to lock in to a personal vision, see it through to its end, then step back and say "this is me... I made this, take it or leave it, but I'm proud of it. Now... on to the next one!"
I'm quite new to photography, but my philosophy here stems from years of writing and recording music. In that medium, the best results always come when you do what comes naturally to you. When you "bend" as an artist and try to be all things to all people, you ultimately end up being nothing to everybody. I think the same applies in a visual art project like this, but that's just my take.