FrogReaver
The most respectful and polite poster ever
All it takes to make your sorcerer interesting is a +2 bonus to wisdom checks? That translates to what, 10% more success? That seems hardly noticeable. In fact it will rarely make a difference at the table.
I feel like you would have been better served by using point by and getting a free skill or racial feat.
That way you can have your high charisma sorcererer who takes the feat that grants expertise in Insight and allows for searching as a bonus action. That gives you your increased bonus to Insight (more than you would get by merely having a high wisdom) and throws in an extra benefit on top that is even more relevant to being able to read people.
All in all, anything you feel rolling will help with in terms of role play can probably be achieved better by using point buy and giving players a free racial or skill feat at level 1.
Also, notice how rolled PCs always seem to have multiple 18+ numbers. I guess players like to cheat. Or suicide their characters if they roll poorly until they get a good roll. That hardly seems like good role play...
WOW. So I'm going to ignore the silly part that accuses me of cheating or suiciding my character. I'm also going to ignore the things that can can be added to any stat generation method like free skills or free racial feats.
So that basically leaves your opinions about +2 to wisdom checks (of which I am only really interested in insight ones).
So let's start with your flawed assessment that +2 means 10% more successes. That's not true. It depends on the DC for how many more successes I will have. If I had a 5% chance of success without the +2 bonus then I would have a 15% chance of success with it. I tripled my chances of success on some of the hardest DC's! Likewise if we look more at an average like a normal 50% chance of success then that +2 means 60% total chance of success which is 20% more successes! It also means I will always pass more lower DC's without even needing to worry about my roll.
The second and more important consideration is that I cannot say my sorcerer is a master at reading people while only have a 12 wisdom and proficiency in insight. That drastically alters my character concept. And all for what you attempt to describe as a measly +2! It's the fact of him being a master at reading peoples motives that makes him interesting compared to other sorcerors!