Okay, everyone needs to go back to Oblivion, and check out the Doomstones.
Doomstones:
1) are marked by the constellations
2) grant you powers when you touch them
3) you can only have the powers granted by one stone at a time.
What does this remind you of? Guardian stones, perhaps?
Stop assuming that they have anything to do with Birthsigns, just because they have constellations on them.
6. Perks are an incredibly unimmersive word. Totally bad. It don`t even mean what it does in the game. the words should be Arts, abilities, talents, etc...
Bethesda's just keeping in tone with their previous game. There were Perks associated with the Skills in Oblivion. Mentioned by that term ("Perks") in the manual (checking in my GotY edition copy, page 20 is "Skills, Mastery Levels, and Skill Perks".
