Caspian has always stated that there is a risk to e everything we do in Elyria, but without the risk there will be no reward. As for as mutations I would think they might come in pairs or groups of three. Thanks If you encounter a positive mutations, then look closer as a negative aspect is just around the corner. An example would be if you are born with enhanced nightly vision which would be great however your skill lacks pigment so you can be in the sun for very long, which will force you to do your movents at night.
I really don't think there will be a lot of mutations but they are a definite possibility.