I don't live and die as much as you do on MiLB batted ball data such as GB/FB%. I would agree, he could use a bit of a LA adjustment, but it's not enough for me to just ignore the rest of the package, and probably not others, too. Yes, he's 1b/DH type, and that's going to limit the path to the Major Leagues (and where you'd list him on a top-20!). But he's also posted the right kind of BB:K you'd look for, and the ISO's have been in the ballpark of what you'd want (though I think .180 is right on the low end of that from Double-A standards). So I think there's a few sides to the dice.
Like I said, 2024 has been a rough go for McGeary on the overall season line. When you couple that with the worsening batted ball data, there's something clearly wrong today (even with a recent go that seems better - more on that later). What that is...not super sure as I can't say I've spent what little time I've had the last month on a ton of McGeary PA's. And as stated, I'd probably have left him off a top-20, but I can see an argument for why you'd keep him in the top-20, as well. I'm pretty patient about moving guys up and down, and if you were someone who looked past the GB% as something of a polish, there was enough there that throwing him in the 17-20 range is defensible even with a tough start to 2024.
If there's a positive, he's been better over his last month, posting a 126 wRC+ (though with much worse K numbers than the past and much worse HR numbers). McGeary's first 40 PA's where he had a -27 wRC+ are doing some heavy lifting right now still. It seems like the nosedive is past him, but now the real work comes in, so I think if you thought he was, say, the 18th best prospect in the system, holding serve is probably fine.
Would I have him 18th or whatever? Probably not, so please, don't think I'm Captain McGeary over here. I'm just saying, I, personally, can buy that argument enough that it's something within reason. If you can't, that's why you have your own list. There's little to no consensus when it comes to such subjectivity.