Ubisoft has announced that Ghost Recon: Wildlands has gotten its fifth title update, and this one adds the new Tier 1 mode. A big deal for those who have reached level 30 as it adds "new levels of difficulty and bigger challenges" for those players. You will earn tier points completing missions and taking on Live Seasons Challenges working your way up from Tier 50 to Tier 1. In combination with this there's a new system to upgrade your weapon damage.
If you play with a group of friends the difficulty will be balanced based on the average tier, and you can also opt to turn this tier system off if you don't appreciate the added difficulty.
Are you still playing Ghost Recon: Wildlands?