I like the Ichor system but it is not very well balanced. I think that the player should decide only between the cool stuff like having an off-hand over an extra ring slot instead of being forced to decide between combat and utility.
My solution is that every time you consume an Ichor all the inventories should be upgraded by 4-3-3-2-2-1 slots on the side until they are complete (this weird number sequence solves the ichor distribution problem while remaining it an only Boss drop). The remaining Ichor should be used to exalt Items instead of having the challenge that asks for 2 Ichor every week.
Also the extra tools slots are useless and if i have 3 weapon slots and only 2 are being used my character should swap between the two instead of going unarmed and if I have 3 weapon slots and only 1 is being used my character should swap between armed and unarmed instead of going over two empty slots.