The play just closed at Williamstown Theatre Festival last week. Critics were asked not to review it, and it looks like they complied -- I can't find any from even the local outlets up there.
Sadoski, Lopez and Park were all in that production. Jesse Tyler Ferguson played the role that Urie will play. The parents were played by JoBeth Williams and Jamey Sheridan -- since neither of those roles were part of the casting announcement, I assume they are either being recast or Williams and Sheridan haven't signed their contracts yet.