This reply is horrendously late - I started taking on the (horrible) Fritzing part editing process and then the Trill Kickstarter campaign happened! Thanks for flagging this - I wasn't sure if I should add all the pins so this feedback is really useful, and I've now made entirely new parts for both Bela and Bela Mini.
I've updated the Wiki with links to both: https://github.com/BelaPlatform/Bela/wiki/Fritzing-file
Please do try it out and let me know if you run into any more problems. Thanks!