With the AoM expansion the shared stash inventory was increased from 4 tabs to 5. Unfortunately 5 tabs of shared stash is far too little space for people that regularly play GD and/or play several characters. Hence why so many players use third party inventory programs or have devoted mule characters. The problem with third party inventory programs is they can’t be used with the Steam cloud and are those programs trustworthy as far as what else they are doing behind the scenes while you are playing. Devoted mule characters just takes away the enjoyment of playing with having to manage so many mules.
I am suggesting an increase to the shared stash. Why not just replace the individual shared stash tabs with a number dropdown menu. It could go from 1-99 tabs or 1-999. Click on the dropdown and select the tab number you want to see. It could even be something similar to the existing CTRL-click window when you want to split stacks of an item in your inventory. How is this not in game already?
There really should be a way for the devs to greatly increase the shared stash without it being too challenging for them to do and eliminate the need for shady third party inventory programs. With Forgotten Gods in development, I would hope greatly increasing the shared stash is something that could be implemented if not added to an upcoming game update.