But yes, especially on my AMD X2 5200, script optimizations aren't going to make a noticable difference (on their own). But my question wasn't "is the benefit noticable", but rather "does it have detriments?" If the mod can cause problems, I'll remove it. But so far it hasn't caused any for me, and therefore my opinion is "if it doesn't break anything, it can't hurt to keep it".
So, I, too, had this little placebo in my load order for a longish while. And I had the same "if it ain't broke, don't fix it" philosophy. Here's what changed my mind...
First, once I really figured out that it wasn't increasing performance at all, I realized that my philosophy was misapplied. I should have applied it to the game's scripting capabilities. They ain't broke, so don't "fix" 'em.
Second, it takes up an .esp slot, which, when I installed it didn't seem like a big deal to me. As I add more mods and become more jealous of the remaining slots in my data folder, I have become less tolerant of useless fillers.
Thirdly, as I've gotten to understand who on this forum is actually knowledgeable regarding mods and scripting in particular, I've found that 
not one knowledgeable person recommends it. And the knowledgeable ones 
to a person suggest dropping it.
All simply FYI...
gothemasticator