what will Renpy 8 change ?
Viewing post in Afterlife Harem - Alpha Release v0.3.9 ($10+) comments
it will be better overall. Usually newer things/software (or new versions of a software) bring more benefits.
Some users have been reporting some weird bugs when playing the android version, which will hopefully be fixed once the game is upgraded to Renpy 8.
As for the content, I will be making a post soon with all the details and new things 4.0 will add to the game