Chris, you just need to follow tennis more
Eleni has been doing well in smaller WTA tournaments and bigger challengers, especially last fall.
Alize Cornet has been in a HUUUUGE, yearslong slump which she is only now breaking out.
Jampie Hampton is having a good year, she made quite a run at Indian Wells, which of course really helps.
Arantxa Rus has sucked for ages now, her RG 3rd round is pretty much all she has (oh hey, sounds familiar, Gise?)
Mattek has been injured and hasn't played for a long time.
Minella has been getting some good results as well.
Flavia and Sara both have GS qf points, but Flavia simply has more "other" results.
Flavia's mandatory results: 1285 points
Sara's mandatory results: 800
Flavia's other results on her ranking: 870
Sara's other results on her ranking: 1100
It's mostly her SF in Beijing that saves Flavia there
I do agree with you that there's very little coming through. Or at least, there are no spectacular breakthroughs, players grow gradually and by the time they are, say, top20, it feels like they have been around forever.