well, her serve can improve a lot, also her movement. The reason that she now is rising I think is because her forehand has improves so much (but can be better).
Sofia has in many interviews said that she is very lazy. But that she now understand what it takes, that sounds good.
Serena And Venus
SOFIA AND ALL THE OTHER SWEDES * Katarina Srebotnik * Pavlina Nola * Rita Kuti-Kis * Capriati & Seles to comeback * williams to destroy henin and momo