We all know that FFXIV's story is very good but it takes a long time to get good. ARR and STB are a huge wall for a lot people thanks to their slow build-up and their uninteresting fetch quests, making some players want to skip them, which is generally not advised. It's nearly impossible to solve this problem inside the game in its current state, however one thing they could do is release a short anime series summarizing all the important plot points of ARR and beyond. People that find themselves stuck in the MSQ will have an alternative and can waste only a few hours instead of dozens. Not only that, the anime would be a good advertisement. Non-FFXIV players that watch the anime may be interested in playing the game. Square already did something like this with FFXV, so I don't think it's impossible for them to do this.