This idea just popped into my head a second ago as I heard friends talking about how they have issues trying to keep all of their gear in order for each job they have and how at times it can be confusing.
As I understand the current limitations with inventory space is that we can have 80/80 and no higher. Now what I propose is would it be possible to create subslots in the case of let's say Your Mog House Inventory
Legend:
* Main bag
-- Name of sub bag
*Mog House=0/80
--Mog House:0/60
--Pup Items:0/20
*Storage:0/80
*Locker:0/80
--Locker:0/50
--THF Items:0/20
-DNC Items:0/10
*Satchel:0/80
--Satchel:0/55
--War items:0/20
--Craft Gear:0/5
*Sack:0/80
--Sack:0/40
--Food:0/10
--RDM Gear:0/30
basically the idea is within the mog house the moogle would give us the option if we would like to create "sub units for the inventory storage units we have at the moment. When the sub unit is created upon pressing say "Mog Sack" another option would come up and ask if we want to look withing the "SacK" "Food" or "RDM gear", this way instead of having to continuously go up and downa list of 80 items to find what we need we could just easily click on our "sub category" within the inventory storage unit and easily pull out what we need.