While I don’t think an inventory change is nessesary as I want to see all of my important stuff on the first page, I agree with your other 2 as well as an ability to go straight to a bookmark!
We already have tabs. Anyone can use them however they want. To limit items to certain tabs wouldn’t add anything especially since you can already do that.
What I do is I have all weapons and classes on the first tab. Then I place a single reed flute every empty slot on the first tab. That way everything gets placed in the second tab. The important things are right in front of me at a moments notice and everything else is a tab away.
So instead of tabs that do all of this for the players - like most MMOs do already, you would have everyone do their own tedious workaround by filling their inventories with junk?
As an alternative to your “fill every slot with 1 reed flute” strategy I always just leave a single herb/ore/fish/whatever in the position that I want it in my inventory instead of dumping every item. That way any additional items I pick up are where I expect them to be.
As an example, I decided to dedicate tab 2 to fishing ingredients/lures. I have far more than what is pictured here stored in my chests, but these are the items I pick up frequently with what I’m doing at the moment. So I put one of each in the position I wanted in tab 2 and any additional items I pick up after that are automatically added to that stack.
It takes a little time the first pass through, but I prefer having my stuff semi-organized and as long as you don’t die in the wilds you won’t have to redo it beyond that.