Originally Posted by
Jeeqbit
Consistency (such as same markers, etc) makes it smooth for new players to get through the MSQ. After the MSQ, many of them will break until the next patch or expansion and SE knows that. Obviously, it's always going to be a minority that want to play the game hardcore / do raids and social content and stuff like that.
The reason for 2 packs of trash always is because there used to be more, but it was deeply unsettling for everyone and still is in some ARR dungeons. You can literally pull like 10? 20? packs in Amdapor Keep! They die really fast now, but they can still potentially wipe everyone if all 4 people are not good players and well-geared and that was much worse in the past before battle system changes.
As a tank there is an anxiety of how many to pull and a pressure to pull them all because most parties want that. Yet doing so carries a huge risk. So SE started enforcing a wall every 2-3 packs and it's been smooth ever since. This makes it better for the whole party and reduces anxiety, but as a cost, it's less exciting.
It has a lot of benefits, including for chain productivity. The consistency of 3 bosses mixed with 2 sets of 2 packs of trash before them makes it consistent and smooth and easy for them to plan ahead. It makes it consistent for players, who know what to expect and know how long a dungeon will take. It reduces anxiety of "how much should I pull" that ARR dungeons still create.