When I am browsing just to see what's new, I don't use filters, but when Im looking for a particular experience then of course yeah, I do use the filters. I find myself using "Extensive" more often than others because those are the kinds of packs that I like; I'm not too into things that only add one or two unique items that appear only in loot, for instance, or individual boss mobs that don't have an experience surrounding them.
I don't know that there are any categories I feel are missing, but I might change my mind on this if some examples are given.