eridium uses

So I just read there thinking of other uses for eridium. I think they should increase the eridium cap to 999 and do the same thing they did with the dlc use the eridium for orange weapons that can you can ONLY get through the vending machine. I also posted my thoughts about backpack space and skill points now I don't know if there's a mod for max eridium but if there is don't ruin the fun. So I would say have skill points, backpack space, bank space, a random elemental weapon change, and a random elemental stack and I think these should be the prices. The backpack space as well as the others I didn't add to the bottom should remain the same as the skill point prices. The elemental stack would be a max of 2 elements per weapon. I know adding this stuff to the game would be difficult but would be worth it well let me know what you think and any adjustments you think would be better. Oh and the new ice element can only be achieved through random elemental change.

Skill point upgrade

+2
200 eridium

+4
400 eridium

+8
500 eridium

10
600 eridium

element change
Fire, slag, erosion, electric, explosion and to make it worth it a 3-5% chance of ice element

800 eridium

elemental stack

900 eridium