You are what you do, remember ? Don't see how picking signs at the beginning that give you powers or bonuses fit in. Only constellations that remains are those that match the skill trees and show you your progress, I'd bet. Again, I like the new approach, but birthsigns were kind of cool.
Seriously, attributes are gone ? How do you not have speed or strength or agility ?
Don't think of them as gone. Think of them as invisible.
And Orc just IS stronger then a Bosmer. A Khajiit is faster then a Nord.
You still pick your own Fatigue and Magika, so there is your endurance and willpower.
Intelligence? Solve the riddles/puzzles... Prove it, that is to say. Beyond that, a Master Blacksmith is sure to have something intelligent to say about blacksmithing. Such is true of any skill, as all skills flow back into attributes. It's six of one, a half dozen of the other.