Doesn't hurt to try a 261/2004 downgrade claim, which would be around -$375. Now THAT would be one of the cheapest biz class fares in history of FT
I would NOT try to do the downgrade complaint now. There's a risk that it'll get mangled in with the COVID-19 refund issue, but do it AFTER you fly. This way AF won't cancel the ticket on you at the last minute.