Looks pretty cool, my only question is why would something with a strength/con bonus and an int penalty have stealth and knowledge as skill bonuses?

Perhaps a race of dimensional wanderers slightly unhinged from reality could have a bonus on climb/jump as they slightly warp space around them unintentionally to suit their needs?

Also, as much as I really like what I've seen (and I will borrow stuff from it) I don't know that much about Pathfinder, including its cosmology, so let me know if I'm wrong on something.

As for the SLA, a standard tiefling gets darkness, a 2nd level spell, most of the alternates are 2nd level spells, blink is a 3rd level spell and may be a bit powerful, perhaps give it blur 1/day or entropic shield 3/day?

This does sound really cool though, I especially like the description and the mental image it gives.