I can't tell what it is, but I always like it even if some updates could contain more but if you like it, you do get impatient.
Yeah, totally get it. We usually add around 20k+ words per update. Just with the structure the game has and the choices involved it means that not every route is always getting a big chunk added to it. But in the end, the game is naturally being made to work as a fully finished product in the future.
Usually I recommend playing every other update. That's a pretty good rhythm to have a decent amount of new stuff added to most options.