So first, I like them, it feels super cool. However, I think either they should affect baron pit too, or have Baron/Rift do something to the map as well as it feels super odd that Baron feels less powerful to the map then the Drakes do now.
Speaking of the Rifts, it would be cool if they affected more parts of the map, but I get why they don't. Maybe the 4th drake can add more changes to the map after? All the visual effects are pretty cool, though in just visuals, Montain and Cloud need way more, like maybe wind blowing on the map.
Speaking of Cloud Rift, its just super dissapointing and barely will matter. It should do something else or have more going on with it, as it just sucks honestly.