Moreno is a 24 year old catcher with 2.4 fWAR in 86 games, who is really good defensively, who walks at a solid rate and strikes out very little. If he develops a touch of additional power, he has a shot at putting out really great overall numbers for a few years.
Varsho is an amazing unmatched fielder, but he is a bad hitter, is probably going to continue to be a bad hitter, is 28 years old not 24, and becomes a free agent 2 years earlier than Moreno.
This isn't going to go down as a terrible trade value wise and shouldn't because Varsho is such a great fielder that he has a floor there, but you cannot be surprised, and you should probably expect that this is going to be a conversation for as long as Moreno succeeds. We obtained him for the #1 prospect in baseball, and that prospect is succeeding.