Looking at these players stats at the time of the trades is the key. Using hindsight isn't really fair, it's small sample sizes of these players performing for other teams, against players we weren't facing. I couldn't find much evidence of Paddack ever being good, he was a bad pitcher on a bad team. Morton's best years were way in the rear view mirror. Montero surprised me, he did a pretty good job. Finnegan was an excellent pickup, until he got hurt.
This off-season will show us how good Scott Harris is at making trades and signing free agents. This Tiger team is close to being really, really good. A top contender. We just need a couple (few) pieces to get us over the top. And it may not be fair to call out Harris. We don't know if he's allowed to spend the money that would be needed to acquire top talent.