Hi,
We will never have something like this unless we end up with 200 expansions where this space is actually necessary because of the overwhelming number of items. A lot of people forget that inventory & inventory management is part of the design of a game, no matter if it's a MMORPG, MOBA or your typical zombie apocalypse third-person action-adventure game. You cannot simply walk around with every item in the game in your goodie bag like a God or Goddess; at that point you cannot call it a game, it's a practice tool.
On the other hand, we understand the struggle to come from servers where infinite inventories are "the norm", so we have increased the Storekeeper inventories from 1 to 3 (free), and from 3 to 5 (IM Expansion). Although we weren't a fan of this change either, it shouldn't be as game breaking as infinite inventories since you'll at least have to walk/teleport to Map1 if you'd like to make use of it. Besides, remember that you may also unlock other inventory slots (up to 2 more inventories) using Inventory Keys which are accessible from multiple sources in-game. Four inventories and five storages on your main, another set on your buffer, plus their respective shops where the items get trasferred to, should be more than enough space. If not too much.
Suggestions discarded. Thread closed.
Warm wishes,
Essence.