Difficult? Are you like 200 years old?
Don't take my sentence too seriously, but I for example like that the game is getting more hard. Not so long ago I could just use one splinter over and over again with the same cards over and over again and win. How was that fun?
Now we just need for the devs to update the events like they said previously - the change that you will be able to play the events and not have to be active at the same time. That's gonna be a huge improvement to the game!
A challenging game will never become massive! People would rather play simple balls than think of a complex game.
Clash of Clans is complicated and has millions of players. I think when we get used to the untamed cards, it will seem less complex. Having so many new cards at the same time makes it like a new game. I don't mind that, it never gets boring.