Fangs of Asterkarn will add (a?) some extra stash space Crate has already revealed, how much/how many exactly we don’t know
Besides that, assuming we don’t get “huge” storage, through the years Devs have always been insisting on if players want more they should use tools, Item Assistant etc (but Xbox players don’t have access to that, so maybe we can hope?)
not sure if it’s exactly what you mean with this
but, FoA has revealed to allow affix transmutation, so it’s easier to customize greens in various ways, and we get an Altar to easier target farm desired variants
I hope Fangs of Asterkarn expansion will bring most of what you need/desire 