It depends how how good the young studs in the rotation are. If Harvey is what he was last year, or even better, and Wheeler is as good as Harvey, or even better as some say he could be, then this rotation will be ready next year (this year?). If TDA is as good as advertised, or even close, the lineup will have three legitimate power bats in it with Wright, Davis, and D'Arnaud. That is a good back bone of a really solid lineup, when you sprinkle in nice OB guys like Tejada and Murphy.
So basically, even this year they could have a team that is almost a contender, except we left out the OF and BP. The BP seems to have depth this year, and finally Sandy did something about a problem that has existed for 6 seasons. They still need a shut down Closer before they can be a contender.
So basically, the need a Closer, and another bat or two in the OF, which can be done by next season, and they can be as good as any team in the NL on any given day.