When I think of pipeline I think of starting pitching, with bullpen still important but more as a byproduct.
So you have guys like Graterol and Duran who got a lot of attention as starters, but looked more like future bullpen arms.
I don’t know which pitchers currently in the Twins system are really making people excited as future starters besides Varland, but I’m sure there are some. Cory Lewis as mentioned in the article but still in A+ and a ways to go yet
Atlanta would be the new team to emulate as far as building a pipeline, Fried and Wright go on the IL and they don’t miss a beat. Atlanta also promotes their arms quickly, which the Twins are also doing, so we might see a guy like Lewis actually debut for a cup of coffee later next season if he continues to dominate.