Should peasants even be allowed to join guilds? What respectable guilds would have peasants as members?
I would avoid using pixies since their dodge trait is a huge advantage early in the game. And I don't think you should remove race specific traits, don't know if you plan to.
Are there any pitch forks in the game? Are you going to use weapon restrictions? After all who has heard of a peasant with a sword? A small axe should of course be acceptable as would knives I guess...