I really like that "All in One" search UI. It would make looking for items alot faster and you'd have a better overview.
I have to agree that the first draft contained too many options.
The simplified version is very nice though. I like the version with the wider search result window the most. Most players use widescreen displays so it makes sense for the layout to use that to show more information.
Something I thought could be a useful feature to have would be a way to compare selected equipment with the equipment you currently use. Or compare to items of the same type you have in your inventory.
At the moment you just see if an item has better/worse defense, evasion, attack or accuracy for example, but you don't see the other stats some items give. (NM dropped weapons and gear for example)
I wouldn't get rid of the HQ buttons. Makes it easier if you are just looking for HQ or NQ items.
I also dislike the blue menus. The main menu looks nice with its transparent black background and I'd love to be able to change the color or even style of my UI to match that.
So I played around a bit too and made a few pics to give you a better idea of what I mean.
Simplified UI without bazaar message
Simplified UI with bazaar message
Simplified UI with bazaas message and item windows above search window
EDIT:
The next step would be to create a unified UI for retainer management.
I t's such a hassle to always switch back and forth between exchanging items and putting up items for sale.
And then let us repair gear without having to unequip it, switch class, open inventory and search the damaged item and select what you want to do with it before you can start to repair it before you can do the same steps again to reequip your equip and change class.
Why not just select the damaged gear, change class atuomatically (if you have the required class, rank and tool ofc) repair the item and change class back. It could be done with one...uno, 1, ichi, command.