Personally I would like to see a couple of fixes. Just annoyances really.
1). When the “Trading Post” screen is selected or open to it should put the curser inside the search box. I hate opening that screen thinking it’s going to do that automatically and I start opening 15 other windows, the map and just about every other windows this game has.
2). A way to not lose your search if going to another screen within the BLTC. Keep the search there and maybe just put a “Clear” field next to the “Search” one. (yes I know there is a clear button inside the “show filters” area but you shouldn’t have to drop that to clear a search.
3). The option to buy more than 250 of the same items at once. You should be able to put 1000 or whatever and then it can just divide up to stacks of 250 in the “Pick Up” screen.