Robbie, I already said that (or at least tried to say it, lol). I mean she was the absolute perfect package. The boobs thing is the only thing she (maybe) needed and that's why I mentioned it, she had everything else already.
Anyway, you mention Kayla Kleavage and Minka (there were quite a bunch of them, like Lisa Lipps, Wendy Whoppers, Sarenna Lee and such), but as you can see, most of them at that time used boobs surgery to exagerate the look to a point many people would consider grotesque. And in my opinion, part of that was because porn wasn't as big as it was later, so the lousy boobjobs of that time weren't worth it unless you were looking only for that massive look without much aesthetic considerations. Even Jenna's first boobjobs were quite horrible.
But as you say, it's not the boobs (only). It's just IT. And she had it
Anyway, just my opinion on the subject for what I remember of the impression she caused on me