Oh my. I had no idea there was an actual... term for this. xD I just always called it the "no-pants" design.
You are right, it's overwhelmingly common. Even in designs that are almost decent and respectful, you get this stuff. All the playable female characters in Trails of Cold Steel have it -- no, seriously, ALL of them have either this zettai thing or are sexualized in some other way. The Kiseki games are pretty decent with gender representation for the most part, but they are becoming increasingly pandering (it's worse now than it was in the Trails in the Sky era). Hell, just for laughs I googled "Trails of Cold Steel cast" and found... this xD
LOL. I don't know who edited this pic, but I salute you.
"Ah, but!", said the hypothetical male countering this, "it's because they are students, and this is their uniform!". Correct, however, it's mighty convenient that the uniform for military students is so sexy for female students, hmm? Not to mention, I did say ALL playable female characters... and that includes the non-students. Behold, in order: the instructor, Sara; the new special student (who isn't wearing the school uniform -- oh, she's also like, 13), Millium; the not-so-secretly-badass maid, Sharon; the badass military officer, Claire... yeah.
And then there's the fact that in Cold Steel 2, they are no longer in school and therefore no longer wearing their school uniform, and yet... hmmmmm
Perhaps I should be ashamed of my words and deeds and I will find out in Cold Steel 3 that it's actually illegal for women and girls to wearing pants in Erebonia.... >_>