>>717795029
Nah, you're correct. Unless you have absolutely no intention of using the GEP the entire game, it's always the better choice since the other weapons are lootable shortly afterward. If you decide you don't want it later, you can always toss it then.
I don't really know what more you would want to add weapon/item wise though. Taking weapon mods into account, there's really almost an excess of them as it is for what's in the game to do. I'm pretty sure I've never played through it and thought to myself "gosh I wish I had something else for this instead of this assault rifle, pistol, sniper, crossbow, sword, GEP, plasma gun, both shotguns, flamethrower, or these various grenades..."
I guess you had some unique weapon cases like in IW, where you had the incendiary caster instead of poison, but adopting flare darts setting people on fire like in the mods would be fine for that.