The game is a one-time purchase and a relatively inexpensive one at that, so I'm not that concerned about the game being infnitely playable. Just a nice story you can finish in a weekend or two. Replayability would ofc be a nice bonus, but in the end I'm serving a specific story here that's a concise package and X hours long.
There may be some end-game content available in the future once we get there. I like the idea of having a branching story for replayability, but that would broaden the developing scope vastly and add months of development time. For now I try to get the core story out and we'll see how the game looks then content-wise.