The deck is actually build with casual kitchen table games (1v1/1vX) in mind. I agree with you of course;
Sandsteppe Citadel would be an immediate drop for me, if I wanted to win a FNM with it.
In the same vein I would cut Sigarda and Trostani from the deck as well as Emmara. Shanna would be an edge case. Instead I would include
Voice of Resurgence,
Windswept Heath and the likes in combination with Kinght of the Reliquary.
I would also think about including some discard spells. Maybe not
Thoughtseize, but a multicolored one.
Kitchen Finks is definitely worth a thought.