Don't get me wrong. As much as I love the guy, deGrom needs to be traded. He'll be 30 by the time he's a free agent, I don't see the Mets turning it around by then, and we won't resign him. But just like that, the Mets cannot trade him for 10 cents on the dollar. An elite pitcher, arguably the best pitcher in the NL this year, who has 2 more years of control demands a HUGE package. It will never happen, but if he were to be traded to the Yankees, it is perfectly fair for the Mets to demand Torres in the deal. However, the Yankees know he is untradable. Thus, it would have to be a package of Andujar, Frazier, Sheffield/Adams, and Florial. Something like that.
However, what boggles my mind is how the Mets do not do the common sense thing ever. Sign some of these veteran guys to 1 year deals (forget how much money you would have to pay) and flip them at the deadline. We've seen ridiculous packages for rental pieces. Moose would have been the perfect one year rental. If you compete, he's a great bat to have in the line-up. If you fall out, you can flip him for a good return. Same with SP and RP. But when the rest of baseball does it, the Mets always seem to be 2 steps behind.
And as to your first point, I was speaking for what has been the trend since the 2006 NLCS. The Mets obviously overachieved in 2015. But instead of adding to the team, by keeping Murphy (I understand no one knew if he would be able to repeat the performance) the front office tries to sell us on Dilson Herrera who ends up getting traded for Jay Bruce. At this point, the mets pitching health is well documented, but they didn't bring in a back end rotation guy just to eat innings. Bartolo ended up being out best pitcher that year for crying out loud.
2015 should have shown the whole world that Familia should not be a closer for the Mets. He blew, what? 3-4 saves? He was shaky in almost every situation he was brought into during the post-season. We should have moved him when we had the chance before the injury.
I can go on and on. The Mets front office is inept and that is putting it nicely. They don't make the moves they need to when they need to. Only Cespedes happened to work out (at the time).