You nailed it on its head though.
Sequels will always be sequels.
They aren't original games anymore, that's why they call them sequels folks!
It boggles my mind that some people expect something new from a sequel to a previous game
You want an original experience, get another freakin game!

I was not expecting anything 'original' with halo2. I was just hoping for the same thing (same feel) as halo 1 with improved graphics and new story. I did not get that.
Don't get me wrong i like halo 2, and think it is one of the best fps...............but i would rather play halo 1 mp and sp any day over halo 2. If halo 1 ever became live compatible (xlink and xbconnect is not even playable with my 512 dsl connection) i would be playing it all the time, and not even look back at halo 2. As of now i play CoD2 as my main fix for fps, and have not touched halo 2 mp in months.