Nice! I know they were intentionally stressing the flaps, but saw at least one was on fire again and deteriorating. How big an issue is this and how are they likely to solve it?

The damage to the trailing edge of the aft flaps was caused by whatever took out the skirt. You can see they are torn up and sheet metal flapping long before they start to descend and heat up. It is possible they would have held up to the heat if that hadn't occurred. I didn't see any burning through along the flap hinge like in previous flights (although they only showed direct side-on video of two of the flaps).