I think some will leave open as well.
Mainly those who wanted PvE and didn't know about the Mobius Group.
I'd actually settle for an information screen on the main menu explaining about PvE groups and letting people know their choices, not just a list of modes people blindly click on and hope for the best. Seen way too many threads from people going Solo Mode when there is no need for it.
I'd still prefer a true Open PvE mode, but I could settle for the above.
Yes but they need to give people flexibility too.. like as Mobius can assign others to be able to accept invites or to kick.. and if he decided to step down he could choose a successor. Or if he is off line for a certain amount of time