Blizzard addressed inventory concerns during today’s livestream and revealed their plans to add another Stash tab in Patch 1.1.1.
Having an extra Stash tab is always nice, but it doesn’t solve the more complex/underlying inventory issues and so they are also bringing up elixir stacks to 99 in the update.
Gems will have a separate tab in Season 2!
Players are carrying a lot of aspects and the team is looking into alternative solutions to the issue. Nothing specific has been mentioned, though.
You will find a recap of the livestream here.