My apologies if this is the wrong place to ask this.
I just got my pdf version and I noticed that the Aasimar Characters have +2 Charisma, and +2 wisdom but no negative. The Tiefling has +2 Dexterity, +2 Intelligence and -2 Charisma.
Was it really the intention to give the Aasimar's such an advantage? It would seem to me that they are fairly overpowered compared to the standard races. (This may just be a personal opinion though.)
I also do understand that the Tiefling has bonuses that the Aasimar does not, which could be considered to outweigh the lack of a negative stat.