Grow up.
It's not much of a feat to accomplish, IMO. Grab a high schooler from a comp sci class, give him a couple sprite sheets, music, and a year or so; you've got your FSMR. Developing a side scroller engine as a physics remake of an already existing side scroller engine is a matter of rewriting/figuring out the original with different speed calculations for the objects drawn to the screen. Adding extra areas, bosses, etc. is even easier once you have your engine.
Also, he's not the only one who believes Metroid 2 to full color and updated sound is a much more satisfying improvement than a respriting and physics change. You're going from SNES to GBA here, which isn't that much of a difference. They have very similar graphics in their games.
If you want to change physics, by all means, go do it, but don't expect it to be as big a deal as AM2R. And by all means, you can interpret this as "AM2R is better than FSMR" and get butthurt, because that's TOTALLY THE POINT OF MY POST.
In all seriousness, the point of my post is not to get angry when people don't agree with your "vision".