I would personally want for bosses to attack more frequently and deal more party/raid wide damage for healers to do more healing than dps'ing and for bosses to have more visual telegraphs for attacks rather than the danger circles we have.

A healthy mix of these would probably help keep the fights from being snoozefests.

Also btw, we shouldnt try to cater to people who pay to skip and try to do content asap. Thats a personal fault on them and not the game where previous dungeons and fights introduce to you common mechanics earlier. I will agree that perhaps having a rotation tutorial of some sort can help with teaching players more on how a class plays.