Senna's ult is way too fast

(reposted from pbe boards)

After being in a good number of games both as, with, and against Senna, I feel like her ult is way faster than a global ult should be. Other champions like Jinx or Ashe or Ezreal have relatively slow-moving ults that take a while to get across the map, and it takes a lot of positioning and luck to connect it long-range, especially because the hitboxes are relatively small. But Senna's ult is at least like 3 times as fast as other global ults, and it feels like twice the hitbox size, making it really hard to dodge yet easy to hit. I've seen multiple times where Sennas have used her ult to steal a kill way on the other side of the map, pretty much instantly. In one game I had, Senna completely trolled our Nasus, ulting nearly every kill that he tried to secure all the way from botlane and once from spawn; there's no way that an Ashe or a Jinx could do that. It really shouldn't be possible, and I feel like it just enables trolling and toxicity.

One way to fix this is by making it the same speed or only slightly faster than other global ults. Another (probably more controversial) way is by making it have the same range as a Lux ult or something, but definitely not global.