This is the first time BOTH ROUTES get updated at once. They both kick off right after Kaoru’s "Surprise" moment. Even though both routes converge at dawn of the second day, the dialogues are completely different almost until the end, so don’t think that just playing through one side means you’ve seen it all.

New words: 15,969 (for a total of 76,462).
New images: 1,088 (for a total of 4,802).
New animations: 5 (for a total of 20. There are actually more than 20, but this only counts the ones converted to video).
New audio files: 18, all for Mother’s new dialogues.
New music tracks: 4.
Extra gameplay: About 1 hour and 40 minutes (playing both routes). With this, the total gameplay is now around 8 to 8 and a half hours.
The warning for the first decision was fully reworked. It now pops up before the choice, with a new look, better visibility, and a clearer explanation about why it matters.

Every warning and clarification from the game’s "narrator" were treated in a similar way to what was mentioned above.
Small tweaks in some old dialogues, probably won’t notice them if you replay everything. I don’t even remember myself xD.
Added a tiny new warning at the beginning of the game because of the changes I made to the game’s distribution system.
Android version compressed for the first time. Instead of the usual size of the normal version (a bit over two gigabytes), it’s been reduced to 725 megabytes.