I didn't think I'd see this day come, but I agree with your complaint. It is honestly worse than before, probably because it isn't actually working properly.
Its a bug. Hopefully it gets fixed, because now you can't count how many deaths weren't attack bonus losses.
Take attacker KOs x 3 - attack bonus = true KO count
The only false results are if someone used up bonuses and did not finish the fight yet. So just keep an eye out for unfinished fights
In its current state, if you look at your defense to count how many of your opponent's deaths were attack bonus losses, your only indication is if the number is green, yellow, or red. If the number is a red zero, you no longer know if the opponent just died 3 times, or if they died 17 times.