Well I can speak from experience. I've had some "unofficial" sealed decks with Early Church, and I had one of my players get Ehud's Dagger, Deborah's Directive, Auto & Awasn with the Judges deck. Needless to say a CBN battle winner, CBN negate (and battle winner against Tiberius) and the speed and CBN creating Angels was way too difficult to overcome. Due to this I created a ban-list for my unofficial sealed, but if people like it that way I personally want to play that way.