Hi LauraHonestly, the easiest way for family members who want to play together on the same world is to play one account together. Having a shared connection is limiting and in my opinion more hassle than it's worth. By playing a single account together, you get the same enjoyment (personal opinion). If you really feel a need to play your own accounts individually, you could play separate worlds.
The problem with those two suggestions are that we tend to have limited playing time and all want to play something on line at the same time, i.e. an hour after school/work before supper, so trying to play the same account wouldn't make sense, and if we all played on different worlds we may as well all go and play different games altogether.
I appreciate TW has a lot of loyal players and a lot of development time and thought behind it so the position on this is unlikely to change, I guess me and the boys will just have to see if we get any fun out of it and if not move on to something else.