Let's be realistic, there is really no way to reach the summit from Feather Pass. The West side is gorgeous but deadly and the East side is (as mentioned) full of dead ends and big gullies. The only way we could reasonably see to make the summit is to hike up the canyon (above LaSalle Lake) to the base of the SE Gully and take that route to the top. Those who say the summit can be reached from Feather Pass via the ridge or even by staying 300' below the ridge are crazy.
climbed the sw ridge from base camp at White Bear Lake, via Feather Pass. Trying to follow the ridgeline, I quickly encountered 4th class terrain, but as the description states some of the difficulties can be avoided on the east side. I found mostly blocky terrain, but most of the committing moves were solid. Definitely a bit of a challenge in routefinding, but still a fun and reasonable solo route in a killer setting. Descended via the SE slopes towards Royce, which was technically easier terrain, although loose and objectively more dangerous than the ridge. Great view from the huge summit blocks overhanging the north face.