I was just in Williamsburg last week, and wish I could have had the amazing opportunities that you had! First, you have an event inside the church that provides something for the ornate interior of the church to complement, and second, you were there at a much more colorful time of day; dusk is a much better time to shoot than midday. Though I’m not sure if you were specifically commissioned to photograph the event, it’s always fun to try and capture artistic shots regardless of the purpose of your presence. For some reason, folks who tote around DSLRs seem to have knack for doing this.
My comment is on the second shot. This effect I absolutely love. I think that the center point should be on something of interest, like on the doorway or one of the windows. The center point is where the eye ends up so that’s where an important element should be. Changing the location of the center point might also help with removing some of the empty space above the church.