Don’t know if this is the place for this, but here it goes.
We can already make an unlimited number of “mules” to hoard our uniques, so why not make the shared stash have unlimited number of pages?
Or at least further increase the limit, 4 pages is not enough.
Categorization and searchability becomes very important once you exceed a few dozen items and even two pages is unhelpful when you have collected a lot of trinkets.
Use Grim Dawn Item Assistant if you want an easily accessible unlimited stash.
There are 3 possibilities for unlimited stashes here on the forum so have a look in the Utilities section and see which you prefer. It’s not going to happen in-game.