Rose has always been able to do EX spark FADC into U1 for more damage at any range, so there’s no point to that combo. Red focus in general isn’t going to be of much use to her, which is fine.
And on a technical note, the PC mod is not accurate for Rose, because you can’t hit a red focus cancel from cl. hk (or any of her normals I believe), which was clearly done in her official change video. But she has no reason to ever actually do that anyways, so whatever.