My first reaction was "Awesome! We got Stroman!" however, after taking a closer look at things the deal seems very odd and the timing of it is particularly strange. At 50-55, the Mets season is mildly bleak considering the teams that New York has to leap frog in order to make a wildcard push.
This team has two phases of the game that we do really well. The third phase is disappointingly brutal. If the Mets had a decent bullpen, they possibly be around 58-47 which would have given them a firm grip on the first wildcard. Instead, this team is likely headed for a 79-83 record and a third straight year out of the playoffs.

Stroman, who is from New York, is under contract until after the 2020 season and if you saw his tweet last night, might have hinted that he wants to resign by tweeting:
"NEW YORK! Where I was born. Where my heart lies. Where my family resides. Crazy excited for this part of my journey. Some things were meant to be! @Mets #HDMH"
Stroman owns a 2.96 ERA this year and has 11 quality starts in 20 starts this year. As for the Mets, as disappointing as the year has gone, they still have a solid core in place for them to sneak into the playoffs in the next 2-3 years.
That being said, I need the farm system to stay in the Top half of the majors and we need stability in the lineup long term. Would be great to have the same 3-4 in the batting lineup for the next five years and would be nice to have DeGrom stay a
Met for the rest of his career.