Axle path is a distraction, it’s the last thing to worry about, so it is what it is.
The vertical position most controls the anti-squat. Oranges have moved up and down a lot over the years – recent bikes are pretty close to just over 100% except the Alpine 6 which is oddly high.
The fore-aft position affects the leverage curve because the more you move it rearwards, the easier it is to get the rear shock mount moving forwards then down rather than down then forwards – the former is more linear (good), the latter is more regressive (bad).
The brake-squat is stuck at around 100% because the pivot is usually close to a 45 deg line drawn from the rear contact patch – it’s not like a four-bar bike where the instant centre (pivot point) can be projected much further forwards.
With a lot of companies there was a progressive raising of pivot points (and thus anti-squat) in a given gear, as bikes went from 3x (so designed to climb in the granny), to 1×11 (30-32t), to 1×12 (32-34t). And designing for smaller chainrings with bigger wheels.