I followed the tournament online (our local high school had a few boys qualify) and my sense was that they were really highlighting that this was the first year of an 'official PIAA' girls tournament, that these girls would be the first ever girls to be state champions, and the girls got the 'center mat', with the two boys' divisions flanking them, and so forth.
Probably not unreasonable given the circumstances, and insulates them from any criticism that the girls were treated as second class citizens.
Going forward though, if girls wrestling really does grow, then I suspect that they will have to adopt a different format. Having it all mixed was probably helpful for any coaches who were coaching both, or parents with both a girl and a boy in the tournament, but it did make the whole event take a very long time, and if you were really just interested in 1 of the 3 events you had a long time between sessions.
We might look at how other more established sports like swimming or track and field handle this if we want to predict the future. I suspect that they mix boys and girls, but have separate dates for AAA and AA. But I've never attended either of those sports so I'm just guessing.