Your Graphic Designer is Tanking Your Site!
Your graphic designer is an artist, a trained expert in aesthetics, a master at conveying messages via images and feelings via fonts. He may also be slowing your site down so much that nobody is seeing it.
Artists tend to be heavy on the quality and lighter on the practicality of what they deliver. It's not entirely their fault. Even the most conscientious and experienced designer needs to sell his work and quality sells. Do marketing departments want to see their company advertised in 4K glory or on their mom's 19″ LCD?
Quality isn't worth the cost.