The Mets need to get more right-handed, there's no reason to think Alonso isn't better than Dom Smith right now, and he's at least as safe a bet in 2019 as Bruce. Sustained success means not giving up 6+ years of somebody in a way that might downgrade a position right now. That is especially true if you're trying to secure the availability of long-term money for front line free agents at positions where you do not already have options. Now you can make an argument that the Mets need Realmuto, who is cheaper than the free agent catchers who are available. The evidence that Realmuto is much better than Grandal or Ramos is lacking, however. In fact, the evidence that he is better at all is debatable. Ramos had an .845 OPS last season, Realmuto had an .825 OPS, and Grandal had an .815 OPS. We are not talking Mike Piazza here. I would much, much, much, much rather pay extra money than give up a high-end prospect who is capable of helping us significantly in 2019.