Too rich for my blood - I think the 600m ascent over 2km at the end was the most difficult bit for me. The 11km walk in with unremitting descent over poorly aligned slab-steps covered (in places) with leaf litter, rocks, etc was also a constant attention-focusing exercise in not taking a tumble. Not that there's anything one could do about it really, short of installing escalators, and of course the Rodriguez Pass wouldn't be passable (to me, at least) without some kind of steps.
More importantly, though, it is worth knowing that there's been a pretty significant rockfall at Beauchamp Falls which obliterated (guessing) 50m of track, leaving a bit of scree and some boulders through which one has to scout a way.
Most important to be aware of is the 30cm soil ledge forming an exposed traverse across the upper section of the rockfall - NPWS have bolted about 20m of cable to the cliff at roughly waist height, and you have to sidle across it. The immediate drop under it is only maybe 3-4 meters, to a sloping platform with another ... I dunno, 10m drop below that. All perfectly safe, as long as you hang onto the cable and don't slip. It felt like my own little bit of El Caminito del Rey, but I'm a great big wuss.