Ehy Krazy =) I agree with you 100%. The reason why I didn't make a thread asking for this is because we, as community, already asked it for years now. Many threads were open and Bungie didn't nothing continuing to carry on this RNG system based on Engrams/Materials/Tokens. I suppose that Bungie prefers this system in order to make the players more engaged with the game [i](or force them, if you want to see things in this way)[/i]. Every Season they're proposoing a new method but it's always RNG layered. At this point, I believe that a "middle ground" like the one brought by Umbral Engrams Focusing is, maybe, a reasanoble option. World Drops in Zavala's and Shaxx's pools is probably due to the fact that in this way players taht are more dedicated only to those Activities have chances to get also something else otherwise the same things. Of course, I may be absolutely wrong about this. This is just pure speculation.
See this is clearly a better system, no idea why they didn’t stick with it