Heh Oda didn't even dare to give some remotely robust panel time to Usopp all this arc and yet he is supposed to be one of the main characters. :/
How about wait before making statements like this. Usopp can do any number of important thing before the arc is over.
Usopp's biggest moment in Enies Lobby was shooting Spandam in the face, which happened after every single fight save for Luffy's, which he had lost to Jabra and needed Sanji's help to save his life.
Usopp's moments come from unorthodox victories. Defeating Perona by scaring her. Defeating villains who are running away. Sniping a little girl lol.
There are people here who hope he takes out all 10 Numbers, similar to one of his oldest lies. Wait and see before assuming the worst