Admittedly I don't know much about Diaz's personality but it seems he may not be cut out for New York. On the other hand though I did find that "moderately" impressive he was able to compose himself and strike out the next 2 batters. Not sure what the issue is with him. I'd try to move him in the offseason though unless VW is married to him.
I know as a Mets fans (or at least I) sort of hyper focus on our own issues. Seems though the Phillies have very similar ones. Not a very strong bullpen and their share of bad contracts. Harper imo has been very underwhelming. If you're paying a guy that amount of money I expect him to lead the team to the World Series and compete for the triple crown ever year. I guess some Phillies fans will defend that contract saying we had to over pay to get him. But still....