Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Does persuasion make the game too easy?

SLIGHT SPOILERS AHEAD - End of Act I

So I just boarded the Lady Vengeance and I started tweaking my party in the mirror. I haven't used persuasion at all during act I and I thought about sacrificing some bartering points that my custom main char has to pump it. The thing is - I worry that keeping my persuasion too high will make the game a bit too easy - after taking just two points I was able to get that adamant deckhand taking care of YOU KNOW WHO to give information about the ship - and I'm cool with that happening every once in a while, but I'm worried that persuasion checks grow in a linear manner (that is, the further you get, the higher ALL persuasion checks get and it works in a sort of binary fashion - either you're able to talk everyone into helping you, or it just stops working altogether).
I don't want to be able to talk my out of every situation, as that's unrealistic, but it would be nice to persuade someone every now and again.
So my question is: would a persuasion score of 2 let me persuade npcs from time to time, or would it become completely useless at the later stages of the game?