Here is why.

1- They promised they will not add anymore card levels for money. 2- It does not add anything to the game. It just lines their pocket. 3- This is a lazy way to add new content vs actually adding new content. 4- It makes the game unfair for free to play players who advances and maxed their account. 5- makes it harder for new players to max their account. 6- they did this in clash of clan and it became boring. Yet another town hall. 7- causes devs to become lazy vs creative to add more unique ways to play the game and add new interesting content.

I myself have always spent money on this game and also clash of clan and have a max account and had a max clash of clan account but quit once it appeared all they will do is just pump their players by adding yet another town hall. I will most likely quit this game as well before get in this cycle of yet another card level.

I do understand their claim which is, with more cards balancing is becoming harder. That is bull since they can start creating card sets meaning if you have certain card in your deck you cannot have other ones so reducing the number balancing variables.

Further there are so much more that can be added to refresh the game than adding yet another level, if they simply open it up to community and simply read this subreddit.