May 5
Papermaking
As of right now, plant fiber/wood pulp is what mainly makes paper from what I can remember in game. However, there are two other goods that played a major part in paper making during human history. Both flax and cotton were used with flax being one of the primary means to make paper during the 15-16th century. I suggest that flax and cotton be added as a means to make paper. This would add more uses for those goods as they tend to fall off later in cycles as well.
Pending
I agree that more ways to make paper are needed. With the recent upgrade nerf, even with BU5 in both your tailoring table and paper maker, it costs 450 fiber for just 1 modern research page. When you consider that most end-game books take 60+ modern pages, we are talking about hundreds of thousands of grass collected just to complete the end-game research. I like the idea of making paper out of flax or cotton, or even other lesser-used crops like sunflowers. Alternatively, they could add a byproduct like "crop residue" to farmer seed-making that can be repurposed into paper. However, I also want to point out that a lot of times, the towns leading the research simply fail to pay an adequate price for natural fiber. How often do you see governments paying 0.01 for plant fiber, while simultaneously paying 0.50 for logs or iron ore? Even as a gatherer using a harvester on my tractor, if prices are set that way and I want to make good money, my time is much better spent farming logs or ore than cutting grass.