Obviously I have no data on this, but I am guessing that players have bought a lot of arionell mercenaries from the item shop and relatively very few of the yuan mercenaries. Arionell is by far the best mercenary in the game and is the only one I ever use in dungeons now.

So I was thinking, why not make yuan an outdoor mercenary, one you can have hunting with you while you grind or hunt in the main maps of the game rather than in dungeons.

Just a thought.