The key thing is not everyone (except Castle Owner and his members) gets to access into Silent Grounds.
Then in that case, who would find it exciting to play? It's so imbalance.
The better ancient grade items only can be picked at LOT, so what else makes the game fun?
There is totally no better alternatives, and that is why for long time later, the players will become lesser.
It feels like you are adding new and better things just to keep old players alive and at the same time not attracting new players.
Even if you do attract new players, they don't stay long after they get bored with it.
The chances of getting one better item via Lottery is so slim!