It's a dating sim, you can do what you want at any time, a linear walkthrough would be out of date in 2 or 3 versions, as I said this is not a VN... ^^
But if you think there's need for one, why not sit down and create one (and keep it updated) yourself?
So the development of the game isn't fast enough, is that what you try to tell here?
The game is meant to be played several times, besides that you could do as many saves you want, so you don't have to play from the beginning again.
Yeah and you ranted about bugs, bugs because of rectons and retcons, which probably all will not be present in the finished version of the game. I totally get that you don't want to start over and over again, but the only solution for that is waiting for the finished game, there is always a possibility that some content from earlier versions can break...
And you talk about your playthroughs and you had some bugs (which you probably didn't even report to the dev), that's bad for you! I got several saves, my oldest is over a year old and I use it every time to see the new content (before starting a completely new save per version) and guess what nearly everything is complete in this save. If you think playing the game again after only 6 times is not worth it, you should wait... (I think Andrealphus said it will take at least one year to finish it some time ago)
I'm also just writing this from my own experiences with the game, I have no spite against you, I just disagree with nearly everything you wrote in your post...