To make the whole ARR MSQ a more streamlined affair experience points from these quests have been increased across the board, and the rewards have also been overhauled to better assist progression (you’ll be less likely to find yourself below item level requirements while trying to progress the story). Furthermore, many of the remaining quests have been made easier to complete, though we don’t know which ones quite yet (expect to kill fewer enemies, scavenge fewer items, and talk to less people). For anyone familiar with the quest line from 2.0 to 2.5 that’s a substantial number of quests that simply don’t exist anymore.
That’s the short of the ARR Main Scenario overhaul. The ARR Main Scenario revamp has had 13% of the quests removed others revised to be simpler.