I don't think it's necessarily fair to paint the drafting and development as having been terrible throughout this front office's tenure. After all if you examine how the current roster was built they've drafted(or acquired through international amateur signing) and/or developed the likes of Vlad, Bo, Manoah, Romano, Kirk, Moreno, Biggio, Gurriel, and used minor/major league assets they developed to acquire the likes of Berrios, Chapman, Varsho and others. There has been a definite lull over the last few years with so many of the minor league prospects eventually flaming out, but there are still a few blue chippers in the system in Orelvis and Tiedemann, and there are a lot of interesting prospects in the lower levels of the minors working their way up through the system. There are other potential impact prospects such as Barger still in the system as well.
The team is going to need to start developing more of their own pitching if they are to remain sustainably competitive as you can't go on handing out free agent contracts to fill out your rotation forever.