Our problem isn't Happ as the 5th guy, it's depth. We have some great pitching prospects but they aren't ready.
This.
We hay two guys at the top of the rotation in Morrow and Johnson that are pretty injury prone. If one or both of them goes down, we're in trouble. Getting another starter for the back of the rotation, a Niese or Jackson type would give us 5 quality starters, then guys like Happ, Cecil and likely Villaneuva in the background in case one of the starters goes down.
And this rotation would be the best one in our divisiion, adding it to a strong Bullpen and a good batting order and were looking pretty good:
Johnson-Morrow-Beurhle-Romero-Niese/Jackson
Also, we need that starting depth a lot more then Swishers bat IMO.