To add a currency that France doesn’t control has a massive symbolic importance to it. It’s also important that the Russians or the Chinese don’t control said currency, or the Americans for that matter. I think this is going to have some butterfly effects over West and Central Africa over the coming years.
There was a big piece in it today about how this move might lead to the expulsion of the Central African Republic from the Bank of Central African States, which runs the CFA franc system.