User blog comment:It's Good to be the Queen/The Thrill is Gone/@comment-5102537-20130105135348

I would understand the end and Kilgharrah's words if

a) Merlin had done something which ensures Arthur's return. He didn't. All we know is that Arthur will rise again when he is needed but we don't know why and what Merlin contributed to it

b) Camelot would still stand in our present times and if then the golden age could finally start with magic being allowed, which isn't the case and can't be the case

c) if there were good reasons for the Old Religion to reign again, alas there aren't since the Old Religion started it all in the first place and is a tryant religion of dogma and oppressing people, dangerous and ruthless, despite the healing magic (which, as we know from season one, comes to a price too which was taking a life in exchange)

d) there was anything that Arthur could possibly do in the future, alas there is nothing since he failed in regard to everything and didn't do anything that would even impress anyone in the present times

It all would make sense if Kilghrrah and others had always said that it was Merlin's fate to help Arthur fulfilling his destiny, which then would be to do something great in the future rather than to lead Camelot to its golden age and to allow magic again. We don't know if Gwen allowed magic and we can't really believe that suddenly all sorcerers and the Old Religion behaved like fluffy songbirds instead of still using magic at the wrong ends like they did before Uther was even born. Due to the fact that there is no magic in the future, Gwen probably hadn't lifted the ban or, if she had, she failed and the whole thing started again, someone else wiped out magic. Either way, no golden age, no happy end, no Arthur who fulfilled his destiny while being alive and no chance  and no reason to change it all in our present times.

As for your last sentence about Morgana. You know what I think of her, yet I don't share your point of view because she was simply insane, mentally ill. In our times she would be in psychiatry ward in order to heal if possible. That would be a much better way to deal with someone like her rather than killing her.