Whether Frontier stop after implementing improved group management tools (and, hopefully, Private Group in-game rules) or go the whole hog and implement an Open-PvE mode - either would be an improvement over the status quo - where a single player could (without direct help from Frontier in the latest "episode") spend quite some considerable time scrolling through a list of c.20,000 unsorted players trying to find the one that is needing kicked from the group.
Private Group in-game rules should mean an immediate expulsion from the global universe. All account data is non-transferrable to other modes. If you are subject to special rules, you should not be able to participate in other modes where players are not subject to those parameters.
Thus... if someone plays in a private group with special rules, they are shelled to that private group and if they want to play in Open or Solo they must start over with a new pilot. That's the only way it is fair and just.