For plain text viewing, perhaps a cmd line tool that uses nimsuggest to edit sources and automatically prefix the module to everything for you (or strip them) would be useful. Could have rules that weight whether to add prefixes based on conditions like if it's third party (eg in the nimble pkgs folder) or only add module prefixes if there are other items with the same name in a single module. This could then be added to your build process, if explicit declarations are desired.
Anyway, just brainstormin'
