I feel like Connor was found, in some way, at the end, especially when
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Evan talks about reading Connor's list of 10 favorite books that was in an old yearbook.
To me, Connor's tragedy sparks a "wake up call" (though that sounds like I'm trivializing it - not my intention at all!). His family was so caught up in daily life that they failed to see what was going on. Everyone ignored or neglected to see that he was suffering until it was too late. "You will be found" is not only a message to those hurting, that they shouldn't be afraid to ask for help, but also to those who might know someone who needs help. It was too late to find Connor before he committed suicide, but then they try to find him after the fact, which is why they gravitate towards the letters and stories.
I know "To Break in a Glove" isn't everyone's favorite, but I feel like it's that pivotal moment when Larry realizes he probably didn't put in all the time and energy he could have in trying to understand Connor.
Or I could be completely off, and completely rambling!
"If you start from a place of joy and charm, you can get away with a lot in the second act. It may be that that's my life. I'm not sure."
~Roger Bart