I ask myself this when I see the "Open PvE" threads.
Isn't everyone who wants that already in Mobius?
Firstly, I have no idea if Mobius is available on PS4 ...
Secondly. Mobius is a closed group ... there's no chance of meeting "new" players, only those that have already registered. I want to be able to experience a CG with other players bringing goods to the station, bounty hunting Pirates, etc. Open offers a much greater chance of seeing that but, presently, carries too much of a risk for my liking.
Look, I quite enjoy playing Destiny every now and then. Raids are fun but you have to organise a group in advance, make sure everyone can agree a time, that your voice comms work, etc. That's Mobius. What I really enjoy about Destiny is that you can be wandering around a planet, taking care of weekly milestones or mission objectives or whatever, and a Public Event will drop in. Suddenly you and a bunch of other players that you don't know (and occasionally one or two that you do, which is very cool) have a shared objective and many emotes are thrown when the boss eventually drops. It's fun. It's PvE. And it's Open. I'd like a little of that sort of thing in Elite.