Do NOT kill Dark Arrogance
You have just made Dark Arrogance worse than it was before the patch. Only a couple of killers can use the missed attack cooldown, and all of them would prefer to run unrelenting instead. All killers who run this perk in the future will have to deal with the increased stun duration. No one will run this perk.
All of the problems that this perk provides, save the stacking, currently exist, and are worse, with STBFL. I get that stacking is a problem, but there is a far more elegant solution than removing the attack cooldown reduction. Just add a cap on attack reductions, and set it to max stacks of STBFL. Then, you could play around with more attack reducing perks and add-ons, because the raw numbers will always be worse than STBFL.
Comments
I think that this perk and other perks are only for M1 killers and that's basically enough of a nerf (only a few killers are the exception) and you sacrifice the whole build to have lower attack cooldown.
If they truly believe stacking cooldown reductions to be a problem, they could have swapped it for a lunge extension, as that would put players in more situations where the increased stuns happen more, but also help a bunch with chases!
All killers have an M1.
Majority of the killers use M2 much more than M1 and having an M1 perk hinders the killer more than helps, it's a waste of a perk slot using one for them.
You wouldn't want to use M1 on Huntress or nemesis or xenomorph (you can but then you waste your power, M1 does need to be used sometimes on them but having a perk that buffs the rare M1 attack just doesn't worth especially if you get stunned for longer).
All survivors can pre run and gain the distance they would get with an exhaustion perk, then why do they need to use them?
Even if there was a cap, having 5 permanent STBFL stacks that could not be removed or mitigated in any way was not a balanced effect and the downsides the perk does have did not adequately make up for it, especially on certain killers who don't get stunned that often.
I agree the route they took to nerf it was the wrong way to go though, I would rather they change it back to successful attacks but set it to 10%, anything more than that is too high for a permanent attack cooldown reduction