I think Jon provided some solid details... Your statement in this thread is without the detail. If you believe the team as a whole hit their peaks in the first half, therefore nobody should be fooled into believing the future will look anything like the first half, offer up the specifics.
For the record, I personally don't see this team as anything close to World Series quality. However, the addition of Martinez has me more bullish about the ability of this team to pull themselves out of this slump and make the post season. Which, given what I had expected of this season, is a massive bonus!
I also agree that the lack of quality talent in our system will hamstring the team from making the moves needed to become a legit World Series contender. I believe they have barely enough to consistently contend for post season play, with guys like Goldy, Lamb, Pollock, Peralta, Owings, Marte, Greinke, Ray, Corbin, Godley, Walker, Bradley... I don't see them signing Martinez to a long-term deal. And if one or more of these players begins to experience poor play and/or an extended slump - particularly Goldy, well - we lose... it's a simple as that. Which does not make for a World Series contending team...