1) Duo Partnerships in Battle Royale! You can partner up with someone in FFA modes and be on the same team, sharing vision, winning together, etc. If you ally up with a bot you can control them too.
2) Barrier removed from the game, and replaced Self Repair. That is to say, tapping (or holding) CTRL in-game will now heal you instead of protect you. The skill self repair simply controls this healing rate.
3) Static Charges has been removed from the game, and replaced with Light Shifting, which gives you extra phasers.
4) Lasing Orb has been changed too, to no longer be draggable with barrier. Instead you can positioning it in the map, then give your bullets extra damage by shooting THROUGH it. Very tactical.
5) You can now pick up items while INSIDE a car. This makes cars great for looting and a lot of fun.
6) Demo users can now buy super weapons. Demo users can also now unlock skills from all 3 skill trees. Demo users can now buy skill points in-game. The new demo restriction is earning cash for unlocks 3x slower.
7) Skill trees now matter again in BR and Campaign, where to reach the higher level skills (like Teleporation) you need to invest points into the tree first. However, instead of requiring 10 points, high level skills now only require 3 points. This allows you to reach these skills in low point games like Battle Royale, but not get them immediately.
8) Made the AI pathfinding smarter in general, plus fixed some bugs and other tiny improvements I can't remember.