Infinity Dungeon has pretty much broken the balance of the game. You can get insanely powerful equipment at really low levels, which makes it frustrating for those who spent a lot of time/effort getting resources and ingredients for the same items.
I wish there was an option for hunters (of the tamer talent tree specifically) to use their skills at 70% hp. I lose lots of fights because I my CDs get used at the start of the fight, and so I don't benefit from the healing effects of my 'Spirit Bond' talent.
In a sandbox-ish game like this you need to be able to have a little fun. Have some objects to interact with outside of the plotlines. I wanna be able to turn the lights off in the cafeteria and get a reaction, or do something in the kitchens, or put lice in someone's bed. It's a little boring just running from person to person reading kinda lame dialogue.
Why would you pay 2000 for the legendary card pack when you can get the ultimate booster pack for 2300, which almost always gives at least one legendary anyway? That's ridiculous.
Left the demons last. I think I lost one match in the entirety of the game, and that was the Men of the West with their cavalry. Basically just spam your best unit.
Hold on, how did the guy in the house before you get there manage to not have the key to his bedroom but still have the power drill and sheets used to get to his van and leave the keys to the desk in which he complains of not being able to get the van key? Unfilled plot holes and hard to see items make Infalk sad.