Well true, low Charisma can also mean you're abrasive enough to get bad reactions out of everyone. Then you just need to follow through with it being empty confidence. And Lae'zel gets a bit annoying with the superiority.
Wyll being witty and amusing could be the fail here. If they think that's enough to make him charismatic, they're thinking too small. A high charisma character will also be abrasive when that gets the desired result. A high charisma character just IS someone who commands respect and attracts followers. It's attitude, behavior, confidence, social skills, everything. Not just a one trick pony being good at sweet talking. People who are witty sweet talkers but not charismatic are quite obvious, and their schtick gets old fast.
Not true always. As someone who is called charismatic in my role play (albeit lawfully evil) by about 90% of people , I can tell you that charismatic characters are usually slow spoken, speak quietly but in a tone that does not echo - voice carries far. They are dominant by interrupting, speaking last, using obscure theories and philosophies, using subtle hints of threats, speak about themselves { run on sentences like I intended here on purpose}. They give part credit for success to team mates while stealing 90% of the credit. Are lazy, usually wearing exotic weapons to show off, and run conjured spells to lazy out of fighting.
For larian the best example to model is Daeran from wotr. He also fits my description perfectly
