That would also causes another problem. Like fiesta online, everyone is at the mid and end game location, leaving the beginner area a ghost town. Mabinogi is the same way, if it wasn’t for the fact that people can set up stop in town, the beginner address looks like a ghost town too. this is the reason why setting up shop for beginners to buy stuff cheaper gives of an impression of a populated game.
Age of Wushu does this well. Everyone setup shops, but they have a shopping feature where you can search for a specific item and it will list all the player shop selling it along with their asking price. The catch is trying to find them, but they give you their coordinates to make it easier.
It’s a bad thing to make low level areas a ghost town, since this is the first impression people will get of the game, and quit if it seems like a ghost town. Lots of advertisement and recommendation will help get new players for the low level. basically everything needs careful testing.
To be honest, i think the current grind at level 1 to 30 is fine, 31 to 70 should be slightly higher allowing players to get to rank 5 easier. The grind after that, is whatever goes. But I don’t think the whole server exp rate should increase, it’s more of level range of the level tablet needs more fine tuning.