I agree with most of this, but I don't think that the current regime inherited a team that was completely past it's prime. The current group took over after the 2015 season, and that team was one of baseball's best at that point. They took a kick at the can in 2016 without taking on any onerous long term commitments, but as early as 2017 the writing was on the wall and the time was likely right to start dismantling the team at that point.
The current group has done a good job overall in developing young talent but there are some notable exceptions to this. They've done a very poor job developing home grown pitching and outfielders. Thankfully there appears to be a lot of high ceiling pitching talent in the organization both in the rotation and the bullpen, but there is still a distinct lack of impact outfield talent in the organization outside of a few players in the low minors.