I don't think there are too many games out there that have just anti-fun built into the game.  You can only play the game for 10~ minutes until you have to wait for your digimon to not be tired. But then your day has to be revolved around the game.  Every 4 hours you need to check your digimon to train it the best it possibly can.  But you are REQUIRED to do pvp as well, which can kill your digimon.  

The shop can be closed , have increased prices and have limited items.  Why? Because it's realistic?  This is actively punishing the player who can only play during certain times in the day.  

This game just needs minor changes to its tired system and remove the strange choices related to the store.  Those are huge problems that need small changes.