I am not a fan of QAB unless I define it myself. It's very subjective regarding whether a ball is hard hit or not and I am not a fan of rewards for solely running up pitch counts regardless of the outcome of an AB in softball. For me, a strikeout looking is never a QAB. Baseball is obviously another story regarding the pitch count.
Like others have said, if I'm looking at one stat to give me a picture of a hitter it's OPS. Takes into account both ability to reach base AND power. To a lesser degree it even takes in baserunning because fast girls can turn singles into doubles and doubles into triples.
A lot of what is being said is pretty much how our conservation went. Especially the subjectivity of how things are defined. I've seen stats in GameChanger that aren't even close to accurate and padded while another season the parent running the stats was a tyrant LOL!
Honestly, I like BA with RISP, Hard hit balls, number of strikeouts. Especially at the young ages. At the younger ages, pitchers can be kind of wild and going with QAB or OBP can make patient (but poor) hitters look like good hitters in the stats.
Neither. Quality AB means nothing to some hitters. My DD's coach preaches hitting the first pitch when possible because the pitcher always wants to get ahead and is likely to throw a strike. Batting avg. is flawed as well. Give me OPS if I can only choose one stat to look at.
QABs include any one of the following: 3 pitches after 2 strikes, 6+ pitch at bats, extra base hits, hard hit balls, walks, sacrifice bunts, or sacrifice flies.
Some of these just don't matter to me much. At 10U, we have girls who don't swing the bat much. They rack up the QAB due to those first two qualifiers.
So "hard hit ball" is really the part of it that is entirely subjective and also what we're really interested in (how many times is there a good at bat that still results in an out).
IMO, skip this QAB stat (I don't consider a sac bunt a "quality at bat" to the extent that I'd want to count that) and just track, in your estimation, hard hit balls. If you want to track pitches seen, that's fine, too, but my guess is hitters who walk a lot tend to see the most pitches, so the walk kind of covers that. Every now and again you'll see a hitter who has a tough 11-pitch AB and still strikes out and yeah, that was a good at bat. But just as often, my terrible hitters look at 5 pitches (3 balls, 2 strikes) and then swing at the 6th pitch no matter where it is. They didn't just have a good at bat.