Hey Beasty,
In regards to the phonograph: Lost and Found events are usually a 1 time event as a fun way for the gals to experience something different. Currently there are no further plans for it.
As for Blair and Cait content: All the gals will have nice, fleshed out stories by the end of the game (which is far off into the distant future).
What I can say is, we'll continue to bring the high quality content that you and everyone else has been loving/enjoying so far.
Thanks again for your support and feedback, as always!