Prayer Mastery & Elemental Spell Mastery:
Look like nice additions for those wary of losing their books.

Master Archivist:
I might double the cost of non-cleric, like prayer mastery, or restrict to nine spell level casting classes, though I don't know the proper way to word the last.

Master Scriber:
Very nice, should bring scrolls down to roughly a wand charge now?

Master Erudite:
Now were talking, ardent powers here I come.

Power Familiarity:
I don't know about this one...its effect looks okay, but the added paperwork that would come with it. A flat increase, or a scaling increase, in unique powers per day would probably be better.