On the topic:
I belive PGs work exactly as intended. With Mobius clocking over 20k players.
And you know that I post on this forum cause I belive that open does not.
The Mobius Group advertises on their website around 40,000 players.
Which is over the 20,000 limit, so they've had to split into multiple groups.
Kind of defeating the idea that all group members can play together, as they cannot.
So as a PG it fails as there is too many people and some people are unable to play together.
As a replacement for Open PvE (or "better than Open PvE") it also fails due to the fact it hinges on one person, Mobius.
If he takes ill, goes on holiday or goes to bed. there is no one to administer the group and enforce the group rules.
Also, anyone breaking group rules are ignored by Frontier. But if it was an official Open PvE mode, Frontier would have to be involved in enforcing the rules.
PG also were never intended to be used as major game modes.
Currently using them that way is basically an abuse of the system.
Proven by the fact the Mobius group got so large (25,000+), it broke the game for 3 days and made it unstable.
So no, PGs are not working as intended when they are being used in place of what should be a game feature and lack basic admin tools for owners.
Also, a the Open Only crowd / forced PvP crowd keep telling me, the number of players in the Mobius Group is nothing to brag about.
Elite: Dangerous sold over 3.1 million copies. 40,000 is less than 1% of the player base. We have more users on this forum, than there is members of the Mobius Group.
So it's hardly a model for what makes a good game when so few use it and a "significant majority" (<-- Sandros words) of people play in Open.