I think the analogy presented actually is a decent argument for the turnaround to potentially occur ... in 2027
Kepler/Polanco/Sano/Buxton all had more PAs in the majors entering 2017 than Keaschall has entering 2026. All but Polanco had more than Austin Martin at this stage. And Keaschall and Martin are seasoned vets compared to the other yougsters mentioned above. Abel playing the role of Berrios is a little more in line, but Berrios had more major league innings at this stage than Abel as well.
So if we're sticking to the analogy, this year is the 2016 season where the youngsters gained the experience needed to make the leap the following year. Which bodes well for 2027. 2026 ... not so much.
And counting on Dozier/Mauer production from Bell/Jeffers seems more than a little optimistic