Of all the trades proposed here so far, Sean Doolittle makes the most sense, but I think Kelley/Rivero/Perez have been pretty reliable in 7 and 8 (Kelley is superb). And the bullpen could get a jolt if Reynaldo Lopez or Koda Glover joins it in August, or if A.J. Cole gains an extra bit of guts by switching to relief, or if Matt Belisle is OK when he comes back.
Trea Turner coming up and Espi becoming a super-sub will help a bit too, probably. I'd guess that gives us an extra win in the long run.