100% Agree with you. it must be something like small contract to make ppl work with each other and make that more easy then it could be if you work alone.
For exm. someone make a good content, video and make it a good Editing. But ppl not like it for some reason and downvote all he did(scenario, video, video editing and so on). Even thought it is good Video in any way. How ever, How far will that creator go alone when his good job will be always downvote, or cant be seen by other Steemit's or Other?
Not all creator know or have a lot of skills and when ppl will start to work in team it will be much easy to make more good content with out losting a lot of time for creating one~

So hope working in team (party) will be possible here as soon as it possible!