For interest, a hundred runs of Randomtest is currently giving an average playthrough length as 52,517 words. Given that total words are in the 600,000 range, I guess on purely structural terms I’m going for replayability in a big way here.
I’d welcome input from anyone who’s been lurking and only recently started playing it on whether you found yourself any more or less inclined to replay it than you would the average CoG game. 
If I don’t pull people into it on their first playthrough enough for them to try at least 4-5 plays, they’ll miss a lot of what I’ve put into it…