yeah, that's something I'm not sure is expressed enough. one character = one complete story told from their perspective. Pathologic was essentially three different games in one, with common setting and characters and plot, but the personal details are all wildly different. people more informed than I have beaten the game as the one playable character. however, there's a deep deeeeeep rabbit hole of meta plot and lore and character insight that only makes sense once the other two playthroughs are finished. I'm not exactly over the moon about it, but it is what it is. is it unfinished? yes, in my opinion. is the game completable as is? sources say yes.
That's part of the issue I have with how the discussion of the game only focuses on there being one playable character right now. This is not a game with a character select where you play through the exact same levels with slight variations in objectives and different NPC reactions here and there; each in Pathologic character represents a full-game length campaign, with a complete story that is told from start to finish, hence why the original Pathologic is such a massive, massive game. Yes, you need to play all three of them to fully appreciate what has happened to the town, but the campaigns themselves do not feel incomplete; you could walk away satisfied having done only the Bachelor and I expect a sizeable number of players did just that.
It's a legitimate point of concern that the game might not be finished for whatever reason and I'm disappointed myself about having to even think about whether or not we'll get the complete game on GOG, especially after having waited for so long, yet for me that doesn't change that what Ice Pick lodge makes are truly special games that are meaty and dense, memorable and evocative. You are not getting a threadbare indie game with a nice idea but too little room to let it breathe, but a full-course meal that really digs into its subject matter and with a distinctive aftertaste to it. I've never regretted buying one of their games and it would shock me if Pathologic 2 changes that.
As an aside, I feel that the game its reputation as an art-game might be working against it to an extent, due to how this label is associated with games that are designed to be experienced over the course of a single sitting, with little replay value them. It not being finished therefore gives the impression of a bad game, as the effect of these traits is lessened when spread out over a longer period of time. IPL does not make this style of art game, however. Theirs are obtuse and intended to be savoured over the course of multiple playthroughs. For example: you are expected to lose when playing The Void for the first time due how it plays with player knowledge. Pathologic in particular is also meant to be taxing on the player, so rushing through it is not advised.
Put together, while the the worries surrounding the game being unfinished are a factor, so is the fact that this is a new Ice Pick Lodge game and that it represents a type of game that we very rarely get. I'm not going to tell anyone that they're mistaken to be worried, but I will say that I feel that by focusing too much on what might go wrong with it later, we overlook what we already have and how special it is.