Please for the love of the Gods can we have a filter in bazaar which will show you ONLY the items you haven't collected. Looking through all collection lists individually to compare to what is available is rather detrimental to playing.
Also, please make collected ones have a red background in the inventory/bag and those that haven't been collected have a green background. Easier to see quickly which has been collected and which has not. The lore tab could also include whether it is a ground spawn or a drop or both.
Being able to search a set by the name would be great also. Many collection pieces in a set that don't share like naming formats make this the real chore. Certainly room for some improvement here.
