It's not a fully fledged episode. They haven't said exactly what it IS, but they've said it isn't that. It's just something nice for the fans. I doubt they'll announce a boxed LE till it's out, so I'm hoping it's not too long after episode 3

I'm sad BTS is only 3 episodes long though, as I feel with this story it could pretty much just run and run at this point.
Our choices are reeeeal similar on this one, which is pretty cool to see. I definitely thought this was the stronger of the two, and one of the stronger of the whole franchise (on a random note, as someone who does acting I ADORED the play, and Rachel's speech on how it leaves you afterwards is so true). I'm really curious to see where episode 3 will go, since I've genuinely no idea at this point - just that where it seems to be going is where it CAN'T go. It's really nice Deck Nine have managed to leave me like that so close to the end
I also really adore how the game is so similar yet so different from LIS1. It's almost the positivity to counterbalance the tragedy in some ways, and I think the format works incredibly well without the time power - I'm basically not even using backtalk much, or being aggressive when I do, because I don't think Chloe is in that place at this point in time, and it's really refreshing to be able to choose to play that way.
I also think that when I've finished BTS and come to replay LIS1, I'll actually play it in an entirely different way now. They've added a lot of context to stuff in the first game, and done it pretty seamlessly, and now the way I played LIS1 seems less realistic and correct given that context. For example, I absolutely couldn't ship Max and Chloe now, after seeing how Max treated her and how she is with Rachel - which is a huge change in my canon, so I'm really keen to see how the changes leave my canon when I play with them in mind.
I also think that it's awesome how in 2 episodes they've basically changed my mind so that Chloe is the main character of both games, and Max is more a supporting role. They've done an amazing job of making her identifiable, likeable, and relatable, and I'm more invested in her right now than I am Max in the grand scheme of things. Can't wait for episode 3 - this game makes me so hella happy!!!
Also, new wallpaper - and the main pic showing off where my screenshot effort went haha
