UNIT - Creature Balance + Visual Changes

Why were all these unnecessary adjustments made around the dragons? They could have replaced the corrosive breath of the Bronze dragons with a storm strike (which would have been in line with the lore) with a slight stat adjustment, and players would have had an interesting dilemma. But as it is, it's just a mess.

These "adjustments" were necessary to further emphasize the difference between a regular upgrade and an alternate upgrade. Bronze dragons specialize in single-target damage, so their damage and survivability were further increased for this purpose, while Crystal dragons are more focused on area-of-effect damage, which is why the "Storm Strike" ability was added, as the old "Crystalline Breath" ability was too unpredictable.

What is the purpose of giving "Storm Strike" to Bronze dragons (Emerald dragons), if they were even conceived by the developers as single-target units? It doesn't suit them even from the point of view of elementary logic; what do they have to do with electricity?