Speech and persuasion checks in RPG videogames suck. Having a skill you dump points in to change an NPCs reaction or bypass a task they may give you is bad design both for the game itself and for role playing purposes.
It shouldn't be an in-game skill, it should instead be a more organic interaction with a large variety of speech options during crucial moments in which the outcome relies solely on YOU the players judgement of what may be the best thing to say to this a specific NPC given the current situation. You speak to them, you learn some of their lore, how they feel about what's going on in game, who they're loyal to, etc.
Then, when a crucial moment that would normally present as a couple of inconsequential replies alongside a "[Speech 60/60] (Perfect logical response that fixes everything)" option, instead of this you get several very different but equally plausible responses with no indication which is the perfect one, but if you've paid attention to everything the NPC said and maybe found some context clues around them or in their homes, the best reply will become more obvious. Throw in a few tricky responses as well, ones that may seem reasonable but actually greatly offend the NPC and lead to hostility, or ones that are easy misinterpretations of whatever context you were given so far. Reward the player for really observing how the NPC talks and reacts, instead of just having them put points in to a skill that makes you automatically smooth talk your way through everyone.
