Having this lingering QF match is a huge problem. If the QFs were completely finished, this all wouldn't be such a problem. It would simply be like last year, SFs Sunday (even late afternoon Sunday with simultaneous matches), final Monday (assuming they don't get play in on saturday).
But, since they are not going to make the winner play twice in one day, they basically have to get the rest of the match in sometime today, otherwise everything is screwed up.
Even after this happening two years in a row, I doubt the USO will get away from Super Saturday scheduling.
But, for the life of me, I can't understand why the USTA (which has tons of cash) doesn't just build a retractable roof court for these situations.
Arthur Ashe stadium (which holds 23,500 people) doesn't seem like a good structure for a roof, since it rises so high and the way it fans out at the top, and it would be much more difficult to retrofit such a roof on an existing structure than simply build a new stadium with a roof.
So keep Ashe with no roof. Build a new second stadium, which seats anywhere from 10,000 to 15,000 people, and design it like Laver Arena at the AO, where the roof can close quickly.