Riot, please start modifying Summoner's Rift for events.
By the time of the next vs. Event, I want a version of Summoner's Rift for every Region in Runeterra so that you can mix and match and we can have, say, a Shurima vs. Void event and half of the map is Shurima and the other half is Void-corrupted Icathia. Turning on ARURF was fun for about 3 days. Once I finished the Missions, the event was over for me. 3 Days into a 2-week event. Changing SR would be a LOT better for immersing your playerbase in events.
Butcher's Bridge Bilgewater Event was the most immersive experience I've had in LoL in years.