The breakfast should be improved. Nothing healthy to eat and the coffee is terrible.
There was no hot water in the morning because everyone was using the shower. I had reservated a double room and in the end got a room with 4 beds.
If your cleaning stuff finds forgotten things, it would be great if they would try to contact the persons previously staying in the room.
Even in large groups it would be better to give every person one key to make use of the lockers and account for the fact, that not everyone returns at the same point, especially in the night.