I would argue that people want to be engaged in the world, not necessarily with a single story. Take Tam-Tara Deepcroft Quest chain and subsequent hard mode quest chain, did you not find that engaging when you first did it. I agree being forced to repeat dungeons and grind them is not fun, I remember the Aurem Vale runs back to back to hit 50 back in ARR

. Again, that's not what I'm suggesting. Have you everyplayer GW2? Each part of the map has it's own little storyline where you do objectives to fill hearts once filled they are fiinished. ESO does something similar with self contained story lines in points of interest that you go through, this would be a huge boost and a way of breaking up the MSQ which by it's nature is always going to be more cutscenes than it isn't, you can balance the exp so players don't have to grind them, they have the option of what path they want as opposed to being functionally railroaded by the MSQ. So have the MSQ be more to the point, with only the pertinent information dumped on the players for the plot and storyline, and then have the world tell the players the rest of the story of that country region etc etc.