Elemental defence and troops

I think there should be elemental defences and troops.I think this will make the game more interesting to see how to the elements will affect the gameplay and peoples strategy.like ice could slow down defences and then fire could destroy the rest of the buildings.Also ice defence could slow down troops and then rock defence could do loads of damage. This could also be useful for attacking strategies. For example If someone uses GOWIPE they could use fire wizards, rock golems, and fire pekka. Since golems are already rock that element doesn't do anything. Also wizard already shoot fire ball so that element doesn't do anything. But pekka isn't fire, so when it is fire it does a bit more damage. Also I think there should be advantages and disadvantages for the elements to balance the troops so there isn't any "better" troops