There is currently not a date announced, though we are all excited to see the remaining paths for the 0.8 version.
People tend to forget the purpose of Patreon, which is to support a project "in exchange for exclusive access, extra content, or a closer look into their creative journey." That quote directly from the Patreon site. While not advisable, this could mean that TTrick wouldn't even need to provide the game to anyone until it was finished, so long as subscribers were getting, for example, access to subscriber-only wallpapers/renders, or updates on the status of the game, which we currently do get.
There are multiple devs on this site with varying release schedules, based on things they have going on in their life. Light of my Life only gets one update a year. There are games that release once a month, every 3-4 months, every 6 months, etc.
Anyway, I've rambled now. I was chatting with TTrick last night. There is definitely some exciting content coming up with the next update.