So, combat advantage seems to be a new word for flat-footed and similar conditions, like flank.Rogues
Sneak attack is easier. Apart from flanking, some spell and special abilities will also give combat advantage to rogues. Combat advantage is the name for the state when a rogue can sneak attack a foe.
A damage threshold? InterestingImmunity to sneak attack is nearly gone. Immunities are almost gone from 4th ed, replaced by damage threshold (something like DR).

Good.Listen & Spot; Move silently & Hide; Open lock and Sleight of Hand is combined. Knowledge (Arcana), Spellcraft and Read Magic is combined to Arcane. Approximately the skill list is cut in half.
I'd like to see trapfinding incorporated in search/disable device, rather than as a feat. And Rogues MUST have it? Me no like.Trapfinding is a feat (rogues have it by default), but others can have it too.
This seems to be old, now changed, stuff.They make pacts with devils, feys, the starts, elemental powers. Their initial pact determines a large part of their powers. There are four types of it: Infernal, Fey, Vestige and Star.
Same sentiment as rogue must have trapfinding. No powers should be pre-chosen IMO.Primary attack is eldritch blast and soul ruin.
Summons are presentInvocation can summon.

Sounds coolCurses are an integral part of your power. Curses are associated with your pact. They are per encounter damage dealing / crippling powers. Cursed creatures are easier to damage with your blast or soul ruin. When a cursed creature is dropped to 0 hp, you gain a powerful follow up attack against nearby foes.
This was suspected, right?As for alignment, most creatures and PC will be unaligned.
