Yea! I think it's important to consider both the mechanics and the narrative implications of the Qualifications you might consider adding. If it wasn’t clear anything that costs 7+ Will-power would instantly drop an Adventurer— which is not to say you couldn’t, but I think it's worth keeping in mind. Similarly I would hesitate to make any 0 cost Qualifications unless you start introducing some kind of other cost. You may have also noticed I didn’t include any traditional enchanted weapons or artifacts {+1 swords, rings of invisibility, etc} except the “Tome of Flies and Filth”. The act of “unlocking” more custom Qualifications could be a great way to level up and/or reward your Adventurers for completing the dungeon, crawl, or quest. I’d probably do new lists for experience type advancements and specific items or treasure for end of dungeon rewards, depending on how you want to go about it.
Anyways, if end up writing your own Qualifications please share them with me! I’d love to see what you're cooking up!