Account bound item switch
Good idea to start with, but lets take it one more step, account wide bag slot that you buy for say 1000 to 1600 gems, this can be any size bag you put in this extra bag slot but any chr. can use from it with things like potions, harvesting tools, ascended armor/weapons. Then to make it just a quality of life item we are only allowed to buy 2 per account as not to be too over the top.
This will make fractals much easier to have your ascended gear for classes of the same armor type, dungeons easier as i dont need to take up over 12 spaces for each chr. with potions. Creadit due to the OP and guildies who mentioned this in TS.