MP2 Echoes is any better than MP?
Just finished Metroid Prime and didn't like it so much.
If you didn't like MP, then you won't like MP2. The game is more structured, which some people like and some people don't. There is an act 1, act 2, and a act 3. They're masterfully crafted, but the loop of finding keys gets a little stale. The weapons are just reskins of MP's weapons with a weird light/dark gimmick, but there's enough new stuff in there to keep things interesting. Boss fights blow MP's out of the water. Even the weakest fight in MP2 is much tighter and mechanically in depth than all of MP's fights.
May I ask what you didn't like about the game?