Our new unis are just like that this year. Thankfully, one of our practice wear bras is a halter sports bra that can be worn under the uni. I'm making Little double up, with a strapless bra and the sports bra under the compression uni. Not taking chances.
I would try to find a supportive convertible bra, that your cp can wear - sports-bra would be best, but if you can't find it, double two regular convertible bras in a halter-style (obviously, underwire-free, and one slightly smaller than the other.)
