They are surprisingly more convenient than I thought they would be. I use the banker every day on my alts doing the Crafting Writs chasing the Anniversary Boxes. I already spend enough time on these activities without schleping to the bank to deposit on each Alt. It adds up when doing this on 9 characters. Same with selling Ornates to clear out inventory.
If they ever sold a portable decon station (does not need to make anything, just decon) I would be first in line to buy that.