I’ve been saying all along they botched this.
I also broke down their changes demonstrating without question the link between decay and rate factors. The 10% claim has always been baseless (“this sounds like half decay”) wishful thinking from the supporters, I’m sorry but it’s true. You’ll find nothing of substance to say otherwise.
https://us.forums.blizzard.com/en/wow/t/pvp-decay-clarification/1128538