I haven't climbed it, but my Bonney guide puts it at Class 4 from Hurricane Pass. Keep in mind that Bonney was from a different era; I have found a Bonney Class 4 to range anywhere from Class 3 to easy 5.
My best guess for why you don't hear much about ascents is that it's remote relative to the range's magnet peaks, and Alaska Basin seems to attract far more hikers than climbers. Remembering what the rock is like around there, though, I wouldn't be surprised if there's a lot of rotten stuff.