Hey @livephast617,
I am sorry to hear that you didn't have a 5 star experience. Thank you so much for sharing your feedback. I feel I should do a better job explaining the features.
What you asked about creating and sharing packs is already possible, you can add custom assets to the character creator. There is an option to create an asset pack that will generate a zip file that you can share with others.
If you want to use completely different assets is also possible in the 1.0.0 version, even if your assets have a different size from the assets created by sutemo, they can still be used and will be completely aligned.