NO, NO, NO!! What distinguishes the QP, and why we all hate them, is that they offer unsolicited opinions! If she says it turned out puffy and do you have any idea why, THEN you can offer your suggestion for improving it, but ONLY then. Even if she just says "what do you think", its still a better idea to just comment on the lovely fabric than give her technique instructions. Getting better in your quilting makes you more at risk for Quilt Police behavior, especially when you see someone who could really benefit from some free advise, but unless you are asked point blank, keep your improvement suggestions to yourself!