Grieco signed before the word came out that Jordie left. If you read the article about Grieco, even it says that he will be fighting for the number 1 position. I think that any of our goalies will be good if given a chance.
Another thing, we have to remember is that Phil and Jordie are two different people and different goalies. Phil seems like he is more of a flashy, make the flying saves type of goalie whereas Jordie was the solid, zen-approach goalie. two different types and whose to say which one is better.