Something else to consider, with non-proc rotations you can learn the rotation and then not have to think about it beyond keeping track of where you are in the rotation. This lets you give more focus to doing things such as dodging aoes or avoiding boss mechanics. With a proc reliant rotation on the other hand, you're constantly having to take your focus off the battlefield to check what procs (if any) have triggered. And one of the design goals the devs have mentioned is simplifying rotations so that players can pay more attention to fight mechanics. Having to track a dozen different procs at any given moment is not simplifying rotations. Thus why RNG has been getting removed left, right, and center. I wouldn't be surprised if future passes reduced or removed RNG from bards and dancers too.