We are going in circles. If the fish are in a healthy environment (no un-wanted predators, clean water, enough hiding places, not too overstocked, enough filtration, responsibly cycled, and enough growing room) then no they shouldn;t say anything other than a simple suggestion. like man some gold danios would look really good in that tank, and you have room for them and they are compatible with your stock.
but if there is going to be a lot of chasing and fin nipping,(which leads to sick fish.) then yes they should say something about your set up in a polite, and constructive manner. because stressed fish become sick fish.