Now seems like a good time to check out reasonable expected WAR from the pieces we currently have for next year, just to look at what we might need to add to try to compete. I would say a reasonable range would look something like this:
Freeman: 3-6 WAR
Simmons: 2-5 WAR
Peterson: 1-2 WAR
Markakis: 1.5-2.5 WAR
Bethancourt: 1-2 WAR if he hits a little better than he did this year at the MLB level
Olivera: ? Let's just throw out a 2-4 WAR range
Maybin: about 1 WAR
Mallex: optimistically 1-2 WAR
So you're looking at a range of about 12.5-24.5 WAR for your position players, probably falling somewhere a little under the 20 WAR mark.
Miller: 2-4 WAR
Teheran: 2-4 WAR assuming a bounce-back to his form from the previous 2 years
Wisler: 1-2.5 WAR
That gives you a range of about 5-10.5 WAR from those 3 starters, probably falling somewhere around 7-8. So that leaves you with something like 75 wins as a reasonable projection for next year's team. You could have everything go right and sit more like 80 from this roster, or you could have things like Teheran giving you nothing or injuries that could drop you back to under 70.
But reasonably, you're probably looking for about 10 WAR to give yourself a reasonable chance to make a run at a WC spot; that's not easy to do, but it's doable. If you went and used your available money to get Heyward, used Mallex in CF, and traded Maybin, then signed somebody like Kazmir for the starting rotation, and you're probably adding 7-8 WAR to your team with those moves, which gets you pretty close.
If you trade Teheran and a prospect or two for a good young bat (still not getting a stud) and use the savings to sign another decent FA SP, that could possibly get you over the top to the kind of range you're looking for.
We're not going to reasonably become a WS contender for 2016, and the only realistic way we add enough again after 2016 to become one by 2017 is if we trade the farm or if a couple guys see significant improvement and give you more than you expect (Simmons getting significantly better with the bat, Mallex becoming a stud defensive CF, etc.). But I think it is doable to get you into WC contention for the next 2 years while you wait on some more of the talent to progress and graduate.