Enemy Design
For the most part, you’ll be dealing with the exact same factions, races, and ugly enemies you encountered in the first game. Bungie has gone out of their way to spruce them up for Destiny 2, though, in ways that not only makes them look more interesting, but provides new gameplay opportunities as well.
Take the Cabal for instance. In the original game they were these large, turtle-like tanks with tiny heads and annoying shields. Compared to other enemies (outside of bosses of course) they weren’t very interesting. But now you have new types of energy shields, Cabal with giant blades, beasts, and interesting weak spots like gas tanks and air vents. There’s more of a strategy in how you approach groups and individual enemies, rather than simply just shoot for the head. Their AI seems to be improved as well along with their attacks. No more just hiding behind cover this time around, and that’s a welcome change.