This is a rather messy compilation of some old UploadWizard-related wishes that I haven't had the time to fully investigate/describe as Phab tasks yet. All of this should be looked into and properly described in a task.
Localize the default [[User:...]] link in the author= field – see the patchVerify that it is possible and document adding new fields to the default upload form (no campaigns)Allow disabling of the multi-language description feature on single-language wikis (very annoying and bloaty)Make the heading field in location widget hideable through configurationMake the Location template syntax somewhat configurableAllow (or document how to do this if it is possible) disabling of adding a tracking category to campaign-uploaded filesMake the {{own}} syntax configurableMake all kinds of Information-related syntax configurableMake file description headers configurableAllow external JS to hook into the categoriesWidget and modify it, for example with a custom input filterAllow making date, source and author fields optionalParse some label messages to allow for formatted text (??)Look into using Vue in the UIUse ES6 in frontend, once it's supported by ResourceLoaderAdd more built-in licensing iconsEnsure adding new licenses is simple and well-describedLook into how different stages of UW could be streamlined / improved to make the upload process faster, especially on wikis requiring less detailed informationPrepare and package a few ready-to-use configuration sets, together with the templates necessary to make it work. That would really simplify the process of bringing UW to a wiki.