Pathfinder passive/buff plus a few other legend buffs

Pathfinder's ultimate zipline should be electrified and can charge team mates shields but damage and slow enemies. Enemy Pathfinders are immune to negative effects of another teams zipline and still recieve the positive effects.

The flames of Fuse's ultimate should burn higher and he should see through all fire.

Mirage should have the ability to send out a tactical clone from his back eg. he is running from an enemy and sends a clone at the enemy without turning around.

Edit - would be also useful if he can just drop a standing clone at his location

Wattson should be able to turn her fences on and off and they should take 100 damage to be destroyed