While the 2016 draft was just bad for almost everyone, Klentak may come out OK if Moniak or Stephen turned out to be decent OFs and Romero and Irvin provide LH depth in the pen. But it's not a good draft.
2017 on the other hand, may save his job if Haseley is a solid starting OF, Howard settles into the rotation, and Seabold and/or Jones become a competent 5th starter. Brodgon has a good shot at contributing as a middle reliever, and Dohy and Warren could be shutdown LH RPs if they improve their command. The wildcard is how Ben Brown comes back from TJ surgery, 6'6 210 and coming on before he was injured, but he's a long way away.
2018 is Bohm, but he may be a good enough hitter to carry a draft if he can handle 3B - that gives you quite a lineup to finish this year and in 2021. By the time Simmons and Pipkin arrive, Klentak will either have a long-term extension or be long gone.