If Oudin wanted to someday win a GS title, she need to has bigger serve and bigger shots (FH or BH) , otherwise she can make supriss by knocking top seeds when they did not play at their best but when they play the best, she will hard to win.
Good news is she still 17. Long time to improve her skills.
I notice that since the Williams sisters introduce the women games with power hitting game, all of the women winning GS titles had big serve and big hitting shots. Players like William sisters, Sharapova, Henin, Sveta, Capriati, Clijster, Mauresmo and even Ivanovic.
Thats why Jankovic and Dementieva had some trouble winning GS cause when they really need a big serve or big shots to save them or win a match at crucial time, they did not have that.
Though of course mentality also a huge huge part of winning GS .