Sure you can run with FC members, but Duty Finder is there to help those who either are in not in an FC, or might have members that aren't around at the time.

This is partially Square-Enix's fault AND a player community fault.

So my question is, does Square plan to do some work around this to make the cutscenes. Preferably FORCE those to watch them so people can actually PARTICIPATE in the battles?

Yes, force others. My gf didn't even get to enjoy the boss fights in Praetorium tonight because they all rushed ahead!

Duty Roulette versions of the instance should be separate from the Regular duty finder for those specific newcomers.