Fixing a....problem
Perhaps this comic did not delve into a lot of plot. Perhaps it did repeat the Introduce Supergirl thing. Perhaps it did change her personality again. But, you could say it also gave her a bit more.....closure.
Lets face it....flying around in a skirt isn't a good idea. So many perverse comments are just waiting about it. However, the more standard super heroine get up she has now makes it so she no longer has that concern.
Perhaps this will be a sign of more maturity...or perhaps the artist is a leg man? Who knows.