Give the reviewer a purpose
Explain the kind of casting you are preparing for and share a focused selection. Ask whether the first page makes your direction clear, which photo adds least and whether any requested material is missing. Avoid asking a reviewer to predict whether you will be selected.
Look for specific evidence
Ask which photograph, sentence or sequence caused confusion. Separate a usability problem from a personal style preference. If several comments conflict, return to the brief and your intended audience. You do not need to adopt every suggestion; choose changes with a clear reason.
Test a revised version
Make targeted changes in VIPCasting and export a fresh PDF. Compare the old and new versions on a phone, checking order, readability and contact details. Ask whether the identified problem is now resolved rather than starting another broad round of opinions.