Judging by the QnA it looks like the gameplay designer used to also be responsible for the characters appearance - nowadays, the gameplay designer is
entirely separateEDIT: entirely separate individual from the art designer. For example, aurora was first conceived as concept art, and different kits were trialed for her. One such kit was sylas, which they decided to ship with a different visual due to the clash between bunny girl and diver-that-killed-you-with-your-own-ult.I cannot, however, explain what OP meant by "product".
nah gameplay and visual are intricately married in any reliably functional product