Thank you for the feedback! I see there is no 14 on the Challenge of Crump delve either, so I must have deleted the row a while back.
I will take the character builder idea into consideration. Perhaps including an option for players to pick from any of the backgrounds for an "advanced start" would be possible. I'm not worried about the balance of characters as Troves is more about having fun and doing cool things.
I am happy to hear that you had fun and if you want to share the link to the stream please do! I will promote it on my socials as well.