I think Brad has hit on the new Mets slogan:

"Mets baseball: you won't be disgusted by it!"

I agree that they should get another pitcher. Over the course of the season, someone will inevitably get hurt. Signing a 5th starter and having Heilman in AAA ready to fill in when that happens seems like the way to go.
That being said, I think Duq should be able to muster up the "energy" to sign a RF for, say, $2mill.