Thing is, the designated hitter is not on trial.
This is not a test run.
It might go away for 2021, but it will almost certainly be back again under the new CBA that is figured out after that.
This is not a change that is being introduced because it's supposed to help the game.
It's being introduced because it's a change baseball wants to make, and because they could wrap it up in "player safety" wording that ward hard to push back against -- while also being hard to prove.
Players, like Matt Carpenter, want the DH.
Plenty of pitchers, unlike Adam Wainwright, are cool with it.
NL owners are even on board -- or else it would not have been ushered in for 2020.
Personally, I like it because I don't like two leagues that compete for the same prize playing by such drastic rules. I think it puts NL teams at a disadvantage to match contracts with AL teams, because there's not that place to put an aging slugger. And while I appreciate the strategy of the NL game, I don't ignore the strategy of adding a threatening hitter to the lineup in place of an almost always non-competitive pitcher.
But the opinions of the DH are not going to make a difference one way or another.
This isn't a test run. It's foreshadowing.