I wonder why they didn't release any spells that cost 8+? Gee whiz!
Cheap spells are fine but generally less exciting than the flashy more expensive spells. So perhaps an alternative route should of been a simple nerf to a certain card, Spiteful Summoner, to allow for a more exciting assortment of spells. Perhaps I am just being a tad pessimistic but I really think this had an effect on the released card pool.