And has been repeated ad naseum, that balancing at the casual level is a difficult endeavor at best, useless at worst.
Which is where I strongly disagree and 20 plus years of doing game design strongly disagrees as well. In regards to summoning its fairly easy to make summoning not destroy casual armies. Which is the problem that the entire topic is discussing.
Not how summoning is fine because tournament armies do fine against it.
But how summoning is a powerful tool that contributes to the imbalance chasm between powergamer and casual list.
And in regards solely to summoning (the topic of the thread) and nothing else that makes powergamer mathematically superior to casual, making summoning not break the game at the casual level has several options that can be worked in.