I agree with the OP. And there are a lot of good ideas in this thread.

As far as voting is concerned, I would imagine that a cutscene would only be skipped if everyone voted to skip. More like an "agree to skip" than a "vote to skip".

But yeah, barring that kind of feature, it would be helpful if there were a status symbol to show that someone is in a cutscene. Also, timers should be suspended during cutscenes. Other party members should be temporarily prevented from running too far ahead/engaging the boss, preferably with a system message letting them know that some people are still viewing the cutscene.