The thing is, they can also nerf Tier 4 and Pit levels, if people cant reach it.
Which is the point about D4 balancing. The scaling is so wildly out of control, not just for the player builds, for everything, including monsters and difficulty tiers. It all needs to be massively nerfed to bring it into something that is manageable again by the devs.
They could start by getting back to place where basically nothing can deal more than 100,000 dps.