As much as I hate this character, this actually manages to give it a creepy feeling that Fusion just fell flat on its face trying to do. Congrats on making an irritating character the way it was intended to be portrayed!
Dude... The SA-X was not scary at all, it was irritating. My reaction to SA-X segments was not "Oh, shit!" My reactions were "Ugh, again?" I was glad to at least see one of them die. And the whole "SA-X reproduces asexually, so there are seven of them" was just more of a "Really?" than a "Holy shit". The SA-X is my least favorite Metroid villain. I vastly prefer MP2 Dark Samus over any other villain. MP3 Dark Samus was pretty good as well. The fact that she was constantly one step ahead kept you wanting to continue and get more powerful, and see who comes out on top.
The SA-X is the sole reason Fusion is not in my top 3. I hate the SA-X as a villain.