He put some finishing touches on his team, but the heavy lifting to allow that had already taken place. The assets were in place for trades as their farm system was overflowing with talent and the major league club was well on it's way.
Again, I liked AA. However, I hold him to the same standards as anyone. He left the Jays with a near barren farm system and a very old team. And he walked into a near perfect situation in Atlanta. Happy for him that he got that situation and capitalized.
But he didn't build it.
We've already discussed the fact that Alex rebuilt the entire outfield at the deadline the year they won (without giving up much). And we've discussed that the team he assembled today is full of stars and impact players that he added without spilling too much draft capital.
Yes, he inherited the best farm in baseball, but he also inherited a team that was coming off a 70 win season. To say that it was easy to build a 70 team into a WS winner is a little silly.
Look at the Padres for example. 3 years ago they had by far the best system in baseball and a near unlimited war chest. Where are they today?
And if you look at Atlanta today, many of their impact players have been brought in by Alex, signed to great contracts, and without ravaging the farm.
Now as to your point that he left our farm system in tatters, that's also largely arguable. In 2015, Baseball Prospectus had our system ranked 10th in the majors. In 2016 it was ranked 22nd. I don't have a BP subscription to see where we're ranked atm, but all the free scouting publications have us ranked right around 20th. In other words, AA left our farm in almost exact same spot as Shapkins have right now, but unlike them, he actually delivered excitement and playoff success.