I saw some of the X3's around this time, they were running pretty much full. First put out a message on X saying they were not picking up after Sheffield Interchange due to being that full.I gave up and got the 1303 X3 from Doncaster Interchange.
There used to be a daily XC via Tinsley and Rotherham Central. I think it was something like 20:55ish from Sheffield, this was several years ago (certainly pre-Covid). If they no longer sign this way, then I would question the logic of that decision, but oh well.