You want to know why her move list is astonishingly predictable? Her mix-up is fast for a heavy, but you can see it coming a mile away. Anytime after doing PP from P string she is fucked because if you fuzzy guard you will also likely dodge the low (OR high kick) if that's used instead, 3P is easy to parry, she has TWO options from her awesome looking, but shit side-step, her kicks are pretty much limited to mids, and we've seen all she has to offer 1,000 times over (unlike your character who has something new to find every day). So her best mix-up is the one you see Gehaktbal use at RoF3, and Sweet Revenge responded by not even using Genfu.
If you want to compare her to Leon (since for whatever reason that's what most people do) she wins. Why? Because Leon sucks. Why does Leon suck? He has insane throw damage that Rachel DOESN'T have. Every move he has might be a mid, but who cares when your opponent only needs to hold once.