It just doesn't look good compared to the old one. It stands out too much.
I love the idea of honorable deaths. It's not rewarding poorer players and hindering the better ones; it's simply making a mechanic that was absolutely frustrating for everyone involved less annoying. You literally had a split-second of time to stun someone. You rarely see it going on in matches because it's just so damn difficult to get that timing right.
About the only time you could reliably stun your pursuer in ACB is if they were trying to poison you or get the Focus bonus, or if you muted them or used a smoke bomb, and even that wasn't guaranteed. I'm good at ACB and I'm lucky to get two or three stuns a match. Stun timing and the fact that kills always override a stun is something that's been complained about on the ACB forums from the very start.
So it helps everyone, including the better players, because only the very best are able to pull off stuns often. Now, so long as you hit the button within a certain time window (wider than it is for a stun itself), even if you get killed you get some points. Sure, I'll still yell at the game when it misses my stuns, but at least I'll get something out of my death 😛