Naomis main weakness is her movement in that she basically can't because she's so tall.
Also she's quite unpredictbale in that you never quite know where she will hit the ball next, screaming winner or the back fence but as she gets older she is improving on this.
The way forward for Naomi i think is to develop a game where she comes into the net more behind her serve and the odd chip and charge. Not a serve vollyer but a little bit like that