Reports saying they're making Circuit Gilles Villeneuve safer, with SAFER barriers, TecPro barriers and a new angle for the Wall of Champions. Something for Codemasters to model, if they get chance!
https://www.motorsport.com/f1/news/key-upgrades-montreal-formula-1-track-895791/
http://www.planetf1.com/news/new-angle-for-montreals-wall-of-champions/
They're also changing the run off in turn 2 of Russia:
http://www.autosport.com/news/report.php/id/129177/changes-made-to-turn-2-at-russian-f1-track
https://www.motorsport.com/f1/news/key-upgrades-montreal-formula-1-track-895791/
http://www.planetf1.com/news/new-angle-for-montreals-wall-of-champions/
They're also changing the run off in turn 2 of Russia:
http://www.autosport.com/news/report.php/id/129177/changes-made-to-turn-2-at-russian-f1-track