Nobody gives me credit for anything.
Digital bits says replacements have been pushed to September since one of the episodes needs be corrected for a missing spfx.
Also from thedigitalbits.com,
Finally this morning, a few of you have asked if you need to call CBS's replacement hotline again to get the additional disc (Disc Five) that's being fixed from the Star Trek: The Next Generation - Season One Blu-ray set as mentioned in yesterday's post. The answer is no. When your other discs arrive in the mail, it will simply come with them. There's no need to take additional action.