1) The "this item has been bought by someone" bug costs me hours of scanning every item figuring what sold instead of just being told. It's very annoying.
2) There needs to be a drop-down in the space next to level with Any and the numbers 1-9 for the grade of material. This would work for materials, missions, companion gifts, and likely a host of other items. It could also apply to gear, showing the grade of parts the gear would re engineer into. This could also apply to schematics showing the highest grade of material used in the crafting. Currently the AH is only aimed for gear and not at all for crafting. This fix would help a lot.
3) Kindly remember the setting for auction length instead of making me reset it EVERY time EVERY where.
4) Colorization of schematics is very flaky. Usable by me applies only to the gear the schematics make, and not to the schematics. When I say usable by me that should imply my skill, my skill level, and not already known to me.
5) The search button is still buggy. If I select from scratch a category and sub category, I can usually search. If I had anything typed in the name box though, and now remove it, I often have to reset the whole pane before I can search again.
Overall the AH is a pain to use as a buyer and a royal pain to use as a seller.