You don’t get my point.
Let’s take an example: 2 team pokes each other and you use BF to poke. Now if we decide that your B is 6 seconds cooldown, and you do poking beforehand, then if you hit all of B in enemy’s face, you will first gain 1 stack of DE, then after 4 secs, you lose it, and then you got 1 stack again. And if you join the fight, you will start at… 0 stack DE.
Now let’s talk about ranged heroes. Let’s Gwen be our representative. We buy a Clockwork for her so that her A’s CD will be 4s, nice! She shoots A, got 1 stack of DE, but then, because the slow has been removed, she has to move away, not basic attacking any heroes because if she does that, she would be killed. Therefore, after 4s, the stack…drops to 0.
Now the same will be applied to other heroes like Skaarf, if you only fire your A and use B only for protect yourself, you will have to wait 3 secs between each firing. So after 4s, you have… 2 stacks.
Now, with the CP nerfed each stack… Good luck stacking it!