They do work like the surplus perk. They essentially apply it to all heavy weapons, as well as increase drop rates. When they work properly, I can almost exclusively use gjallarhorn.

Thats the problem, when they work. Any time Ive had a weapon with the Surplus perk Ive NEVER run out of ammo for it. While with Ruin Wings I can easily run out of ammo. They are most definitely not working the same as the Surplus perk.

It's the surplus perk across all heavy weapons, plus a higher heavy ammo drop rate. Thus by definition the Seeds of Ruin perk > Surplus perk. If you're seeing a lack of ammo drops, I would suggest restarting destiny. And if YOU really do never run out of ammo with just the surplus perk, then you are free to use a different exotic/no exotic. I am partial to the armamentarium, that second lightning grenade is OP as -blam!-, especially in Control. But ever since I solved my problem, I see more heavy drops than primary. Ruin Wings ftw.

Ive turned my PS4 off completely and its still not dropping that often. Im not saying they dont work, at times yes I do see more Heavy Ammo Drops than normal. Problem is they usually want to drop in clumps which isnt a good thing. I would just like them to be made consistant. I likely will use one of my other three Exotics, Glasshouse/Inner Most Light/ Alpha Lupi. I just loved the idea behind Ruin as it basically did what I was hoping the Titan would be by default and make the Heavy Weapon your primary. Unfortunately that isnt the case as of right now.