Will it make a difference? Possibly.
Will satellite builders actually make their satellites fainter? Gosh I hope so.
Will they actually talk to each other about how they do it? Probably not. But if that tech is subject to ITAR regulations, they definitely won't.
Are there more important things to worry about? Oh my yes. But how often does the US State Dept ask for public input on something that affects the night sky? Now's your chance to run the experiment and see if they listen!