Live Shared Access for multiple people to build maps together

It would be awesome to be able to work on maps with another person at the same time and see it live, so that 2 or more people could be editing while we can also see what someone else is doing. Since me and my friend build maps together, we are constantly just watching the other build and giving suggestions but still are left with one person doing all the work most of the time. Being able to work together would be awesome and really rewarding especially in shared DM styles or just have fun together.