If I were selling this product, I'd probably update my product page and/or my
page about CAN networks to at least mention that if a star topology is used, the stub lengths should be kept as short as possible to minimize the risk of reflection interfering with communications.
Debugging a flaky CAN network is one of the least fun "learning opportunities" in FRC. Having done so in the past, I'd personally be hesitant to deviate from a linear bus without a good reason, and in that case I'd try to keep my deviation as small as possible.