The reason I do not use the term public is that I think that implies anyone can do anything just like they can in the current public universe. The last statement did imply that the planet renter/owner could limit access so that means the planet is not public like Boori.
Not really. If I have a group or a guild that wants to build on the planet then they all need to get there when every they want to as long as the planet supports enough players. Why should someone that has nothing to do with the planet renter get any preference over the planet owners friends or guild who may have builds or e working on a build with the planet owner?
Edit:
James discussed in this topic about limiting rented planet access.