9...d5 might have waited until Black had caught up in development

13...g6?! disturbs the king side pawns without necessity. An alternative is 13...Kf8.

19...c5?! places a pawn on a black square. The objection to this is that if the white squared bishops get exchanged this will make Black's remaining bishop bad. Black will want her pawns on white squares. If Black has to make such a concession perhaps she needs to prepare a right moment for it.

21...d4?! places another pawn on a black square. One again if Black has to make such a concession she may need to find a right moment for it.