There are a couple of key changes that explain this:
Take a look at the photos of my track (fully clipped now).
The 2.6" lug track and the 3" no longer have the rubber guide nubs that the older 2.4" lug track has (out side of the rail). This loss of nubs makes the damage more evident and also allows the track to wander off the hyfax. As you can see the damage is in front of the lug and outside the normal alignment of the hyfax. As the lugs twist forward,(on acceleration) the front of the lug pushes up into the hyfax and wears quickly. There is some wear on my 2015 track too, but not near the wear as on my 2016 AXYS track. By fully clipping the track this twist results in metal on hyfax rather than rubber on hyfax. You probably could get away with simple flat top clips but I choose to go with guided clips to improve the track alignment as we spend most of the day on sidehills. I expect trail riders in good snow may see less of a problem. When Polaris decided to lose the rubber guide nubs in the new tracks, they should have changed the clip location to the lugs. This is how other manufactures do it.