I actually like it, it reminds me of the historic flag of France with the "fleurs de lys" on a blue background from which it directly comes from.
Though the flag of the Nord de france and brittany duchey are dope as well, also charged with a lot of history
There are so many cool armorials though, here are a few from the north of france's regions:
Pretty cool though I doubt anyone would be like Hey I want to carry the colors of their own specific region or even closest old castle