http://www.pcgamer.com/rainbow-six-siege-mid-season-reinforcements-update-goes-live-tomorrow/

Good news for fans of impromptu jumping through windows. Ubisoft has released details of the upcoming Rainbow Six Siege "mid-season reinforcements" update, which will make changes to Kapkan, Blitz, and Ela, incorporate improvements to the netcode, and make a number of balance changes and bug fixes. 

The Spetsnaz defender Kapkan will carry five "entry denial devices" after the update, and their laser tripwires will fade out and disappear when they're deployed, making them much harder to see and avoid. The important part for those about to stumble across one of these devices is that instead of being instant kills, the mines now deal 60 points of damage. That may still be enough to kill you, but at least it's not a guarantee anymore. Kapkan is also being changed to a 2-speed operator (he was previously 1-speed), enabling him to cover more ground and thus more effectively set up his defenses.