I’ve been leveling a new char lately through questing and I’m trying to find more quests that actually change the world like “Saving Astranaar” in Ashenvale (obviously redundant now since the Horde destroyed Darnassus) or “Tyr’s Hand” in Eastern Plaguelands. I like feeling like I made an impact so if there’s any quests out there that change the area like the ones I mentioned then I’d appreciate it if you let me know.
The goblin and worgen starting zone quests are great for feeling an impact, the way the zone and the zones change as you go through the short questline is really nice.
Battle for Andorhal in Western Plaguelands
Fiona’s Caravan in Eastern Plaguelands
The Day that Deathwing Came in Badlands
I’m sure there’s many more but those are the few that come to mind right now