In a conversation about this issue on IRC channel #perl6 on 25 Oct 2016 starting at approx 06:24, module authors and users express concern about modules polluting the user's namespace.
Several main desires IMHO: User: 1. Selective import by object name(s) or tag(s). 2. Selective import by excluding object name(s) or tag(s) [perlpilot]. Author: 1. Tagging or otherwise marking subs to enable the user desires above. 2. Enable multiple export tags to better organize export categories.