There was better suggestions already: new perk +2 Charisma, just for bartering charisma test. Of course perk from the group of non combat perks.
It can be just changed smooth talker skill to +2ch than +1 int to purpouse of dialogues
It would be nice to have characters that could fight (at standard pvp level) and also had access to all the other things in games. Likewise characters that can talk, craft and quest that can fight in pvp.
(one of my 'test' characters is a CH1 mutant - and yeah, he can't buy from some of the shops and can't lead a group... it's hardly the equivalent of setting any other stat to 1).
You missed the point that SPECIAL stats aren't equal and they can't be made equal.
you'd be better simply removing the stat and some SPECIAL points.... which would then be called SPEIAL points, obviously.
If you want to make enemies, try to change something.
Yes, this seems better. Though we could unlock it at a certain speech % and combine the two ideas.