Because every module has a quest involving the use of only equipment with drawbacks, it would be very nice to be able in shops and when viewing your collection to see only cards with drawbacks. It's rather tedious otherwise to search for these items. It would seem that the easiest way would be to add a third option to change the 2-way All/Usable toggle to a 3-way All/Usable/Drawback toggle, as then you could still select from the pull-down filter based on type of equipment (boots/helmet/etc.).
I think it would be better if the 'usable' section took into account the 'only cards with drawbacks' rule. I think that would be useful and intuitive and there would be no additional UI clutter.
While that would be helpful when entering a module, it doesn't help with the shop or if trying to plan your party in the Keep.
Another feedback to add. There are currently no Martial skill item with drawbacks. My warrior have to always run with an empty slot for that place.
Actually I think you can already do this, although unfortunately due to the name of the quest it isn't obvious. Unless I'm mistaken there's no such thing as a "drawback" card. The cards with the black background are called "handicap" cards in the game. Therefore, if you type "handicap" into the search box you will get all the items you have which have a black card on them.
WAUGH! Why haven't we been publicizing this feature more? Do you have any idea how many people have cried for a "search for drawback cards" option? I may sound like I'm shouting, but I'm near-GIDDY at the fact that I can SEARCH FOR DRAWBACKS! Or, more accurately: "Handicaps." The game should really pick one term and stick with it.
