Auto-translated
Why?
1. Phoenix damage is 20-40. Is that low? Paladins deal 10-20 damage per hit, and the overall damage increase to living troops is quite comparable, and the damage to dead troops is simply the highest. Cyclops have relatively low HP, that's true, but you need to consider that in the same castle, the total HP of level 3 units is 360.
2. There are tents, and some of them are quite interesting – where you can get rid of an artifact.
3. Regarding the role of diplomacy. I held a tournament, an arena, where diplomacy was devalued. And I didn't observe much interest. In online play, diplomacy is prohibited, but in offline play, it enriches the game. If we talk about editing, it is possible to make it impossible to use diplomacy for key guardians...