How is the Addison Reed trade looking?

Remember Addison Reed? He was the Diamondbacks closer from 2014-2015. He underwhelmed repeatedly, and was sent down to Triple-A last season. He was unceremoniously traded to the Mets in a late-August trade, ending a disappointing Diamondbacks tenure.
Since the trade, Reed has been nothing short of solid with the Mets. He had a 1.17 ERA with the team last season in 17 regular season games, and was a major part of a bullpen that took them to the playoffs. This year, he has a 3.65 ERA in 13 games. This is far better than the 4.23 ERA Reed posted with the Diamondbacks.
So things are going great for Reed. But what have the D-Backs gotten out of it? Well, they got two minor league pitchers: Matt Koch and Miller Diaz.
Koch, a third-round pick in 2012, is doing very well with Double-A Mobile. He’s currently 0-1 with a 0.61 ERA. This seems to be good news for the Diamondbacks, who are getting solid results out of a fairly high draft pick.
Diaz, on the other hand, is not doing as well for High-A Visalia. He has an 9.39 ERA in 15.1 innings pitched. Diaz is a 23-year-old pitcher who was signed out of Venezuela by the Mets back in 2009.
Koch clearly seems to be the better of the two prospects. If all goes well for him, he could be in the major leagues someday. Keep an eye on him. Diaz seems to be more of a work in progress.
The Diamondbacks may have traded a star reliever in Reed, but don’t worry. He’s still not a franchise player, and they have a prospect who seems to be doing pretty well from the trade.