Understandable, but what if someone were to offer constructive criticism on your gameplay, and how fun it is? What if elements of it were not fun? Your wording was, unfortunately, not only incredibly rude, but badly thought out.
And clearly your modeler does care about the criticism as he took the time to listen to it. If he were to change it, and listen to my criticism, your best option would be to accept the new model as it would be better anyway. That is unless of course the team preferred the original anyway, in which case you have all the liberty in the world to keep the old one anyway.