I don't think anyone actually benefits if they put more depth into the questing experience of the MSQ. This game is built upon its instanced battle content and trying to shoe-horn more depth into monster killing, NPC chatting, or fetch-questing is just not going to impact players in the long-term. I would much rather see that effort being applied to the repeatable content that comes in the post-game, not the content that the vast majority of players do one time, if not just outright skipping.

That being said, I think this criticism is actually rooted in players wanting a change to the formulaic structure of the game. While the staleness of the FFXIV formula is not limited to its MSQ progression in each expansion, focusing specifically on that area we have had three straight expansions with mandatory dungeons at each odd level and the final level, and trials at 74/84/94, and 79/89/99. For a majority of this game's current playerbase, which started playing at Shadowbringers or later, it's been enough times through the cycle now that a lot of people are just seeing how formulaic this game is and begging for anything to excite or surprise them as they progress to the new maximum level.