Literally the only necessary Centurion nerf

Make his jabs incapable of wallbanging. This will eliminate his nasty infinites, prevent super long, high damage wall carries with the jab after his parry counter to heavy, and prevent punched players from being instantly destroyed against the wall in a gank.

Cent will still have nasty parry followups and wall combos, but no infinites. This would put him in a niche of having a solid but simple kit with dangerous combos. I dont see anything wrong with having a character with high damage punishes at the cost of few utility moves. In this state centurion would still be very good but with no bullshit combos. It drops his maximum combo damage significantly and combined with the S3 patch changes he'd be a good bit less threatening in a gank.