And scaling linearly is probably not enough to keep the amount of total absorbs level, let alone the increase you'd hope for several tiers later. "Probably" for now, I haven't worked the numbers out yet, but I'm moderately confident. Agree with everything else, including arguably Celestalon being stupid -- he's certainly acting like he's not interested in valid, verifiable information or his testers' opinions.
EDIT: What I have done, a few pages back, is calculate that for the Rage income to stay constant between BRF N and HFC H, the damage increase has to be 73%, while both Str and Stam increased in the forties. Obviously keeping Rage income fixed at higher AP would mean more total Ignore Pain, so I haven't yet run through what it needs to be neutral.