Say you get 4 engrams from a strike which doesn't even happen all the time sometimes you get only 2. Of the 4 you get 1 is a weapon, you decrypt that weapon you get one weapon part. Well do the math 10-15 minutes per strike. And if you're super lucky maybe 2 engrams will be weapons and maybe one will give two weapon parts. Wow a whole 3 parts . Can't even upgrade one node. Good luck infusing and upgrading at that rate. Also they tool away reputation from nightfall so weapon parts were a good replacement for rep. But now most people are scavenging for parts. Miniscule reputation for factions . Insulting low weapon part return rate. So yeah strikes are still not an efficient way to get weapon parts. The parts just need to be increased as well as weapon engrams instead of armor. Just did 2 nightfall got 5 engrams 4 of which are armor and one heavy. YAY I HIT THE LOTTERY!