Change race to Mind Flayer late game
Back to the OP, I think it's a terrible idea to be able to change your race/class midway through a game but each to their own. There are already 'race exclusive skills' when you create a character. Respeccing stats I can sort of understand but feels like something that only powergamers would really care for. Pretty sure you'll be able to find the best class builds on the interwebs in good time to work out the strongest skill choices for your class.