Get Out! No seriously just go now!
I do agree with you on the Ammo system. I mean it meant that you were effectively restricted to just power beam.
Also the stacking system in MP3 I think is a bit crap, because it will mean you won't be able to change weapons:nono: on the fly which was the awesome thing about Metroid.
Environments uninspired. Nah mate thats Halo. MP2 may not have had such vibrant, rich, fantastical Environments as MP but still phenomenal none the less.
"Dark Aether as you mentioned was the worst idea ever in a Metroid game, lets restrict movement in what is essentially a game where you are supposed to explore! " This I whole heartedly agree with.
I think Retro really need to start proving to us that MP3 will be the best because right now its not looking that way. But I still have a very open mind.