so Lae'zel talking to someone like Mayrina makes as much sense as Astarion talking to Zevlor and promising he'll rescue the tieflings. It keeps contradicting established characters whenever they're pulled into a dialogue over the main character and by doing so breaks immersion, which is why it's constantly an issue.
I suppose - but immersion is kind of subjective. I find it counter-immersive when I send in Gale to keep the peace between Aradin and Zevlor, only to have the game focus on my non-charismatic rogue instead. And while I'd never consider Lae'zel a compassionate peacemaker, I don't actually see a problem if someone decides to make her one in their game.
On a side-note, I noticed today that all humans come pre-loaded with Persuasion proficiency regardless of class, whereas the other races don't (their CHA skills, if they have any, make sense for the different classes). Couldn't say whether this is a new change or not, but I've made enough non-CHA types that I think I would have noticed it before.