I don't think there is much proof in terms of scientific studies that column stagger is better (column stagger is usually preferable over ortholinear), so can only really give my personal experience. I strongly prefer column stagger, I can still type row stagger and sometimes use my laptop's keyboard when I travel, but all these lateral movements feel awkward now.

I've also been eyeing the Kinesis Advantage 360

The 360 is really nice (I have a 360 Pro), but I'd order it somewhere where you can return it easily (eg. Kinesis themselves). For me, the Gateron Browns in the 360 are quite a large regression compared to the Cherry Browns in the Advantage2. The Gaterons are smoother, but their actuation point is way lower. Gateron specs say 2mm, but it's closer to 3mm in practice. This makes typing on the 360 quite tiring for me. So it's mostly collecting dust currently (I am using the Advantage2 and the Model 100 most of the time). But this is really personal, some other people do like the Gateron switches.

I wrote up a short review of the 360 Pro here:

https://danieldk.eu/Posts/2023-04-15-Advantage-360-Pro.html

I think having Ortho layout makes using the numpad on the Kinesis a lot better. The big ergo benefit to me is the thumb clusters and the fact I can remap keys like (),[],{},~ to be easier to press. I have setup the "delete" key on the thumb cluster to be a layer shift and moved symbols to easier to press fingers than ridiculous pinky extensions. The numpad is also easy to use since I just hit delete and then it's already under my right hand and I don't have to move it. Since it's Ortho it feels like a numpad. Previously I never really used the numpad because I didn't like moving my hand over but now most of my numbers are typed that way.

I don't think MS/Logitech boards go far enough even in the split department.