Odyssey engineering requirements have dropped by 60-70%
Mission rewards now include every type of data/item/goods and quantity given out is 3-4x what it used to be.
Power regulators are no longer required for suit upgrades.

Note that spawn rates for items in settlements haven't changed, but it's now more effective to pick an upgrade then choose 2-3 missions with the rewards you need, rather than looting random items.

Grade 1 is one click, grade 2 is now 2 clicks, etc. No random rolls any more.
(The exception is when you're levelling up with the engineer.)
HGEs now spawn 100+ materials, not 4-6.
Jameson has 8 beacons instead of 4, and they spawn 20-30 mats each
Crashed Anaconda sites have 14-16 damaged cargo racks with loads of raws each.
Mission rewards now offer ALL materials, not just the usual BC/MEF/EFC
Mission reward quantities are 3-4 times what they used to be.

There is no more grind. You'll get more materials than you can use just by completing missions, so there's not even a need to go farming specifically any more.