According to Swen (Monsters and Explosions Twitch interview, around 40:00 iirc), it's on their to-do list.
I didn't know that, thanks!
I like this idea!
I don't know if this was the intention of the OP but my issue with social spells is that you can't cast them in a conversation. Casting something like friends is rarely possible before you engage in a setpiece conversation like Kahga or an goblin encounter where conversation starts automatically and advantage could be really helpful.
I can see the need for some balance if you can give yourself advantage on every charisma roll you have to make, but that could be offset with something like a stealth skillroll to fool someone that is well versed in the arcane or a willsave from the target to signify someone with an extra strong will.
Yup that was the idea, that during a conversation one of the options would be [DETECT THOUGHTS] which would let you click that option to use the spell. Whether or not it should just cost a spell slot or require some other check would probably have to be balanced out.