The elemental dragons do not fulfill their purpose.

When RIOT put the elemental dragons, the idea was that players had to adapt to each match. But dragons do not work that way. They have become a RNG element that permanently buffs the team normally is winning as it tends to have more control over the map. It is providing a free pasive snowball if significant dragons appear.

I think RIOT should make any changes for at least the dragons serve their purpose. For example, give a temporary buff as the Nashor. Use existing advantages but instead of permanent, that are temporary (and stronger) and so do the players have to adapt to circumstances. And so the snowball red buffs would stop if several consecutive appear.