this has now been addressed by 3 additional options that handle all variations of single substitution, single transposition or single deletion. (they're not exposed in the demo form controls yet, but can be enabled via url params):
https://leeoniya.github.io/uFuzzy/demos/compare.html?libs=uF...
commit:
https://github.com/leeoniya/uFuzzy/commit/63dc67b8bdb7577f85...