Proof Process Disapointment

I love the quality of the stickers I received. sticker mule always delivers great products with excellent color and clarity. My issue, and really my only issue in so many orders, is the proof process this time which kept pushing me away from my initial design because they said the lines I chose would not print well. I kept adjusting my design until this suggestion was no longer given and the result is fat lines that make me sad and confused and, frankly, to disappointed to use. I know my designs are my designs but the proof suggestions are being given, I thought, by people who know better about the printing aspect. Unfortunately, I now have stickers with unreasonably thick lines compared to what I originally wanted. And now I think the original design would have been just fine.