If only that was enough. When you are in an instance with a higher number you can actually be split up when you wipe. When ppl move from the lower number instances system will try to depopulate the highest instance. Then it will not allow players to enter it again and you have the problem again. ex: While you're busy wiping in instance 3, the groups in instance 1 are completing ops and are moving on. Then system will begin to depopulate instance 3 to keep the lowest number of active instances. Even with 1 player still in instance 3 you will not be able to enter that again.

Usually have bodytype 2. Sadly if you're larger than that you are barred from some places, (like getting a datacron on Alderan) and there's a larger chance of getting stuck in geometry when trying to find a shortcut.