Hi,
Thanks for the suggestion! That change would heavily impact game balance as inventory management is a key mechanic. Adding that much free space could unintentionally affect other systems/elements of the game. One thing a lot of players are not aware of is how "time" and "space" are a few of the currencies of balance, and they are well thought of. We are happy with how inventory is managed at the moment, and this change would go against our vision of the game.
Warm wishes,
Essence.