I'd be really interested in seeing an XL tempest matchup chart. I don't know him well enough to make one but I'd be interested to see how many characters he still beats. I think some slight advantage ones for him like Sub became even, and some slight disadvantage ones may have became straight up losing like royal storm. Id expect a lot of 5-5s probably but I really don't know.
Probably going to be unpopular with my opinion, but I played the character for a long time, so i'll give my completely honest opinion.
Imo he beat Kitana before the patch, now it's probably 5-5. People say stuff like "Kitana has always beat Kung Lao in Mortal Kombat", so maybe past games have influenced credible players, to think that he loses on this game. I don't think that MU has ever been horrible for Lao on this game, at least after she got her damage nerfed.
Match ups like Jax, A List Johnny, Flamefist Liu(Tempest specific), have went from tough match ups, to horrible match ups. Also, a lot of 5-5s or even 6-4s he had with characters like Takeda, D'vorah, Shinnok(both BS and Imposter), Sonya, Erron Black, could easily be losing MUs now. Ferra Torr as well could be a losing match up. It could have been before, honestly. It just wasn't explored.
Popular characters that he does well against and could possibly beat, are Shaolin Kung Jin, Alien and Kotal Khan.
I had him winning vs Cassie, Reptile, Sub Zero(I went back and forth on that being a 5-5 or 6-4 Lao), Kano, Goro, Jacqui, Kenshi. These could all be 5-5s now. Kano might win.
Who knows what Mileena vs Lao was before the patch. Now I don't think it's debatable, Mileena wins. Whether it's 7-3 or 6-4, Lao loses.
Jason, BRC, Triborg, Tremor, Ermac, Predator, and whoever else I didn't mention, i'm not sure on.
Oh and he still beats Tanya.
Again, all my opinion.