About metroidvanias, the problem was that they were copy paste each other in a big amount and that they were coming out, almost one game each year. I would rather wait 2 years? to get a new game, giving this way the time to whoever was making it, to make new graphics/sprites, work the scenario/music and have something fresh. The only game that was going in that direction, was OoE, but still it was having it's flaws.
Now, about MoF, what i really love, is only one thing, the bestiary. I like how the enemies/bosses are presented there, with animations, something that i have seen again only at Aria of Sorrow.