It's just desu and his bots that play this game.
Anyway,
Lack of updates, no hidden abilities etc. I, for one, don't want to invest in breeding to see it change when the new update hits.
Shiny hunting(no skill mmo)is apparently the way people get excited these days. When the most boring part of the game is getting the most attention, it drives away anyone who wants to stay.
The game is filled with non interactive grind, hence people afk and talk with friends/play a better(more interactive) game.
The storyline is good and they have increased the sense of challenge, but the end game content is still borderline non-existent.