things like searching or crafting/buying the right tools/objects for bribes etc., kind of like the adventure game mechanics.
I just did my first real play-through of the Merchant's guild which is one of the more dialogue heavy factions, so I'm trying to think about this idea in terms of them.
-QUEST SPOILERS BELOW-
At one point you want to infiltrate the barracks, but you need a specific Imperial Guard armor to wear. If you get Mercato to help you get in, he knows a house in town where you can get some and takes you there, and you use skill checks or gold to acquire it. Otherwise, you get Cado's help and he has some of the armor he can sell you and skill checks can lower the price.
So going by the above idea, instead of Mercato taking you to the house you might instead need to ask around town similar to the Outpost supplies. It would be nice if that was an option even if you went the Cado route instead of Cado just happening to have the armor. Both of them could tell you need the armor, but its up to you to find a way to get it.
In terms of creating it, there could be an option in crafting to create specific armors such as Imperial Guards uniform and Daratan uniform (which I think is used in a different quest?). You could do something similar with alchemy. I mentioned the Outpost supplies a moment ago where you can buy weak rat poison or use persuasion to get stronger poison for the quest, why not allow an alchemist character to create their own poison? You could add a mid-level skill alchemy poison that is tasteless and used only in text adventures such as poisoning the wine supplies. Of course if you go this route, you would probably need to add more poisoning quests and craft armor (or other items?) options to make this useful for the entire game. And even then it only really helps crafting/alchemy characters, though I do think it would be nice for those skills to be more useful to non-combat characters, and twice as useful to hybrids.
The real question here however is how much extra work would this be to implement, and would it add enough to the game to be worth it? That's not something I can answer.
As it stands right now, pure civil skills characters are fun in the sense that you have stronger dialogue options and you get to see new paths and usually learn more about the story or characters. After playing a combat or hybrid character, it is nice to go back and play the same quests as non-combat so I can see those options I missed. Having strong speech skills in Zamedi tower and finding out some very important backstory was particularly rewarding.