The use of complete instancing of planets is a show-stopper for me.
But I do realize that the words, "certain planet" were used. So there is hope for me, that not all planets will be instanced.
I can understand having certain planets instanced, but not all.
My reason of opposition to full use of instancing is that this limits the possibility of encounters by other factional parties. Not all encounters must be combat related (Don't government pass treaties between themselves from time to time?). An example (oh no, not an episode example), was during a 2 part episode in which the Federation, Klingons, Romulans and Cardassians were out trying to get all of the clues for this great mystery, which may have been a powerful weapon. Sorry, but I forget the name, though it is a popular set of episodes. In the end, all four met up and claim the last known clue. There were tensions, but no combat. When the mystery was solved, this built a better understanding between the Federation and Romulan Star Empire (I'm not spoiling the ending for those who may have not seen it).
Such an encounter with four faction interaction of players would not be possible in an instanced world. Instead instanced worlds, create static themeparks, much like going to Space Mountain at Disneyland. A balance of instanced and noninstance I can accept, but not complete use of instances. That takes out the RP of a MMORPG and the socialization.
