Fenes 2 said:IMC, Charisma is one of the most important stats - according to the number of PCs with high charismas. Lowest Charisma, irrc, in 2 campaigns is 13, while con and strength have numerous 8s, 10s, and 12s.
As far as this feat is concerned, I'd replace it with the feat spellcasting prodigy, that counters the -2 penalty for some races handily and has to be taken at first level as well.
You must play an unusual campaign, or at least one with amateur players. Charisma is most often the first dump stat, and Constitutution is almost always the first or second highest stat.