Changes include the ability to slot Kinetic or Energy weapons in primary weapon slots, improvements to primary weapons coupled with a decrease in special weapon potency, and several balance tweaks for perks. Players will also notice changes to strike lists and the like, as well as raids now sporting a limited revival time for teammates and individual tokens used for the revival. Read up on the full set of changes in the exhaustive patch notes, and get used to them now; when the actual expansion arrives, you’ll want to be ready.
Not coincidentally, Destiny 2 is currently among PlayStation’s freebie games, so snap that up while you can if you have the Plus membership.
Source: Official Site. Cheers, Steve!