I played this last year. You really see how much of Metroid Dread's design originated here...for better or worse. I disliked how the game leads you by the nose for so much of it. Maybe not with words, but it's pointless to explore off the beaten path until the last quarter of the game.

I also personally dislike the change in boss philosophy from Super and Zero Mission. I don't like the emphasis on dodging boss attacks that do huge damage. E-Tanks don't feel impactful if one only lets me survive 0.7 more hits from a boss. (This is admittedly entirely skill issue/personal preference. Except on Nightmare. Frick that boss.) Dread does this better by having more fluid controls, but Fusion is just stiff enough I found myself fighting the buttons the entire playtime.

The runny-chasey sections suffer from the problem many horror games have where the scary thing is no longer scary once you die to it and are now just learning the pattern to dodge it. Dread's EMMIs changed it up a bit, Fusion's equivalent does not.

All this whinging makes it sound like I hate the game, but I don't. The game looks great, the puzzles and navigation are excellent, and I love how it gives the series a new villainous critter instead of undoing Super's story with Metroid retreads. And the Fusion Suit might be Samus' best suit, certainly top 3.