Shamelessy stolen from the official OW forum!!
Ana
Nano Boost
Now also instantly heals the target for 300 health
Developer Comments: This change should give Ana the flexibility to use her ultimate in a wider variety of situations.
Brigitte
Shield Bash
Cooldown increased from 6 to 7 seconds
Developer Comments: Slightly increasing the cooldown will give Brigitte’s opponents more opportunity to play around her Shield Bash ability.
Doomfist
Rocket Punch
No longer impacts Symmetra’s teleporter
Now destroys Symmetra’s sentry turrets without stopping his movement
Developer Comments: These changes are just quality of life improvements for how Doomfist interacts with Symmetra’s placeables.
Hanzo
Lunge
Cooldown increased from 4 to 5 seconds
Developer Comments: Hanzo’s Lunge ability allows him to be very evasive, the increased cooldown should make him slightly easier to catch.
Moira
Biotic Grasp
Passive energy regeneration rate increased from 2 per second to 2.4 per second
Developer Comments: This gives Moira a bit more healing to work with in situations with no enemy targets available.
Lúcio
Crossfade
Aura radius increase from 10 to 12 meters
Sound Barrier
Temporary shields granted increased from 500 to 750
Developer Comments: Increasing the amount of shield health gained from Lucio’s Sound Barrier should make it more effective against incoming burst damage. The increased aura radius will help keep more allies within his heal and speed range.
Mercy
Caduceus Staff
Healing beam reduced from 60 healing per second to 50 healing per second
Developer Comments: Mercy’s previous healing output made her nearly impossible to replace in any team composition. Even after these changes she will still be able to deliver more healing over the course of a match than any other support hero. This change should allow for other healers to be a more viable pick.
Sombra
General
Reduced the size of Sombra’s head hit volume
Developer Comments: This is mostly a bug fix, as her head hit volume was abnormally large, especially from behind. Previously if you fired at her from behind near her upper spine, you could land a head shot. Now her head volume is much more accurate.
Reinhardt
Barrier Field
Decorative insignia no longer protrudes from the shield’s surface
Developer Comments: By smoothing out Reinhardt Barrier Field, he will be able to consistently block enemy abilities and projectiles (e.g. Junkrat’s grenades).
Widowmaker
Grappling Hook
Cooldown increased from 8 seconds to 10 seconds
Developer Comments: The increased cooldown will slightly reduce the frequency that Widowmaker can reposition herself.
Zarya
Energy
Drain rate reduced from 2 per second to 1.6 per second
Graviton Surge
Radius reduced from 8 to 6 meters
Developer Comments: With the reduced Energy drain rate, Zarya should be at higher energy on average resulting in more overall damage and quicker ultimate charge times. We’ve also decreased the wide area of Graviton Surge, so players are more able to aid allies without being pulled in as well.