So yeah, I've noticed Persuasion is broken, horribly horribly broken.
Picking my highest attribute option (25- Strength) always leads to failure while picking my lowest attribute option (11- Finesse, 1 from gear) is automatic success. Why? How does it work? Why is it broken like this? And will success be more than just picking your highest attribute? How does the civil ability come into play (got level 2 of that btw)? So many many questions.
It does seem a bit broken, but keep in mind that each situation is different, and different responses will be favoured depending on the circumstances. For instance, if you're trying to get some soldiers to leave the area, convincing them that you're on their side will be more likely to work than threatening them.