I've continued to ponder this, and think it was a good ending for the Superman franchise.
But, ultimately, is a bit of a betrayal of Smallville.
(is this how people felt at the end of Ent?!)
Basically because it undermined its own story that it'd built up, in an effort to fit with the franchise - which it hadn't done before. It had honourned the franchise, but did its own thing.
I still enjoyed it though. Smallville has ranged from very good to very bad. Overall, it events out. It's a good show, with a good ending.
I watched Superman the movie today... the music must have put me in the mood!
Plus I thought more about Dean Cain in that suit paying me a visit in the night... but that's my private thoughts that turn up often.
And at the end of the day, I'll always be a Lois and Clark fan foremost.