Cliffs:
Drops will now be at your average GS or above. Purple drops cap at 490, high end at 500.
Recalibration changed to allow higher ceilings on transferred stats (higher caps). What this means is that you will more likely be able to transfer the "full" amount of your infused attribute. However, recalibration will no longer raise gear score. Instead it will raise "recalibration score".
There will be "other sources" of 515 gear (not just DZ). (They didn't say what that would be or when.)
Adding Blue / Purple mod blueprints - you can buy from the crafting vendor.
Blueprints: there will now be a weekly project from each settlement that will reward a blueprint, as well as a single daily project each day.
There will be an increased chance for ammo drops when you are low
You will be able to carry more (grey) crafting materials. 600 instead of 400.
Hard Wired crafted gear will now be 480+ (instead of 460+).
Edit: There was also a discussion of a new type of skill mod (battery). My impression was that you could put the battery mod into one of your skill mod slots (like for the turret) and it would up your "skill power" for that particular skill, which would then allow you to utilize higher power mods in the remaining (turret) slots. But I missed some of the discussion and might not be explaining it properly.
They didn't say exactly when these changes would take effect, or if some would happen sooner or later than others (or if they did I missed it). I assume most will be when the next Title Update occurs.