Young pitching. You can't bet on it and you can't bet against it.
Front office and field staff has done a pretty good job of shielding guys. They have aggressively moved guys and appear to be alright with throwing guys in there who don't have a reliable third pitch. It's one of the changes in eras because that was rarely the case until the last decade or so. With teams using the bullpen earlier than in previous eras, you can protect younger pitchers and cobble things together over the season, but like Hudson2 says, that doesn't really fly in the post-season.
Someone is going to have to step up or they are going to need another solid mid-rotation guy. Maybe Elder takes the next step, but the analysis kind of points to him being who he is and what he will remain. Not a high ceiling there (at least in my estimation). If they get a solid #3, Morton and Elder each kick down a spot and you've got a really good rotation.
Agree with the young pitching. I don't think there's a single pitcher in that group that can be counted on as a sure thing but I think the group is strong enough as a whole to provide a number 5 starter and potentially better.
I just don't want to be stuck paying long term TOR money for MOR/BOR pitching. That's a risk with most of the top pitching options.