I think the main issue with Writing is that it impacts so many Myth buildings - something in the range of 180 - by replacing their +1

with +1

. If you're aggressive with hunting you can easily have dozens and dozens of Myth buildings, to the point where the smart move is to delay researching Writing as long as possible.
I checked a recent game where I was in the Ancient era, a few tiers short of Writing. My 48 Myth buildings were worth 73.35

, while my 6 Elder Councils were worth 21.15

.
It would be helpful, I think, to spread out the obsolescence of these buildings to nearby techs, just as LumenAngel mentioned was done with the Stone Tool Maker. There are a handful that are obsoleted at techs like Sedentary Lifestyle and Trade, but much more spreading out could be done.