Just climbed this today. It certainly scratched all of the alpine itches: exposure, wildness, views, solitude (only party up there). Really fun pitches with the dihedral topping the cake for me. There is still a good amount of loose holds and flakes (P4 flake that you stand on isn't long for this world).
It has the alpine weather too. We charged up it while MHB was shrouded in mist and didn't feel a drop of rain through the partly sunny sky until the summit. By the end of the first rappel it had begun to rain. By the second rappel it was hailing and thundering. Third and fourth rappel we were rapping in a waterfall with the sky lighting up within a mile of us. At one point my partner felt a warming in his arms and his hair started to stand. Not my favorite place to be covered in metal doo-dads. The descent gully was also a waterfall and some pretty powerful flash streams washed out some upper portions of the main trail.
We made it down fine and with all the storming and drenched rappels we were car to car in 9 hours. 2 hours each way hiking, 3.5 climbing, 1.5 wet rappelling (didn't need the intermediate rappel on P3 either, a 70m got us to the ledge where we could walk to the next station).
Thanks for putting this up! It's a pretty stellar route and I really don't think it would make sense as a mixed route. The few natural protections spots are a pretty dicey mixture of unattached blocks and flakes with some excellent cracks.