All these people are downvoting me but Geoff clearly says the following

Her alternate fire is still a charge-up large projectile, but it has a bunch of important changes as well. First off, it charges to max charge in 1 second, down from 2 seconds. Next, the projectile speed has increased significantly, currently it has changed from 10 m/s to 30 m/s. Lastly, instead of piercing enemies, it now impacts enemies/environments and explodes, dealing area damage around it. We’ve been heavily iterating on how much damage this ball deals now, but a direct shot has been hovering in the area of 130ish, with a large % of the damage coming from a direct impact (rather then the explosion).