People don't realize / forget that they tune around a combination of actual performance and their internal numbers. For example, maybe Havoc is going to scale better with better conduits/gear/etc and will be closer to the middle than it looks like based on this buff.
Not saying that's actually the case. I think they also said they don't want to disrupt the general order/rankings inside of tiers, instead aiming to just reduce the delta between top and bottom.