hi!
i had ffs with ousterhout two and a half years ago, so i can speak to a few of these concerns and give my more recent experience, with the caveat that things may have changed in the time since then and wouldn't know.
in any case: dr o is old. there's no way around that fact. i heard that he was going to be cutting his hours down to part time while i was there. i don't know if he went through with that, but i'd believe it.
however, though he was old he in no way seemed to be in poor health or at all senile. guy was sharp, and despite the scheduled 10 hours of surgery he performed it all in about eight.
all that said: it was not a perfect surgery. aesthetically, i couldn't have asked for a better result. other than a small raised scar in my scalp that has to do more with my nasty tendency for hypertrophic scars, and a similar cut on the underside of my chin for the tracheal shave, i made it out just about cosmetically perfect. i was not pretty before, i am pretty now. the right side of my nose and upper lip are at around 50% sensation and are a little bit crosswired, so some of the sensory nerve got messed with there, but it's a tiny area and it's not wholly numb. my only real complaint is with the trachea shave.
my singing voice was pretty damaged by surgery. one of the muscles of my larynx was somewhat weakened, leaving me with slight dextrolateral paresis of the vocal cords, meaning that even now, my voice fatigues quickly, and my vocal range lost a lot of the high end. i have gotten about 80% of it back with a laryngologist and voice therapist and my speaking voice is normal again, but it isn't at 100% functionality and never will be. now, honestly, i don't know if that was something that happened because i was unlucky, or because he's old and can't be trusted. but it's something that has to be considered when checking him out. he wrote the book on ffs, he knows what he's doing, and i would not doubt that he is highly skilled even now. but the possible complications are there.
dr. o is the most aggressive of all the surgeons with bone and tracheal cartilage, as far as what i've seen. for some people, that's what they want and/or need. it's what brought me to him. for others, that's not what they want.