Same problem here. Photos prior to Aug 2nd 2014 all vanished after IOS8 download. Have spent 6 hours talking to various Apple people today, had my phone wiped & re-set TWICE, after which I lost more photos, those taken before Aug11tg, 2014!!
Apparently they are in my iCloud account, but FIVE Apple Support staff, (2 in Ireland, one in Kentucky and two in Nashville) tried & were unable to return them to my phone. By 20.40 I called it a day after an entire afternoon of frustrating tail-chasing. Will get back to them tomorrow.
So much for backing-up on iCloud- not much of a storage depot if it refuses to release data when asked.
Am also not impressed by the disappearance of Camera Roll, this wasn't broken so why did Apple decide to mess around like this and create such a mess?
The ApPoe experience has been very disappointing.
I now regret not buying the Samsung Galaxy 5 and am considering dumping the 5C And getting on anyway.
Definitely not buying any more Apple products again unless they can seriously get their act together quickly.
I think that their spell of riding on the crest of a wave may bed over.