It's a difficult balancing act. We as players have many divergent expectations, motivations, and play styles. IMHO, the loot from the "quest" should be the main reward and this should scale up as POI difficulty goes up (not necessarily just in end loot but in overall POI loot). The Trader rewards should be minimal.
Trader Quest rewards changed the meta game, for the worse IMHO. Many players just purely focus on the quest progression. They rarely if ever, even consider looting a POI without a quest. Which is maybe a disservice to the game. I enjoy the game much more looting where, when, and how much to my whim; and not being forced through trader quest progressions.
Although not universally popular, introducing deeper RPG style / Barter quests may help. Need a beaker? Do this, and this, and this, and bring me that, that, and that. Could be used to remove some of the RNG gating if a player felt it necessary. Even a bounty approach to quests having lower and higher difficulty quests available (not quest progression levels) may change it up a little.
Having said that, the game does not provide many alternative activities other than building to focus on. I am cautiously optimistic for "rescue the survivor", "defend the settlement", "Fix this", "Destroy that", and other creative genre and game world appropriate type activities.