I like the idea of an all at once bang. Isn't that MtG's model? Seems they do well with a big bang approach. Also, There is a severe lack of new mechanics each cycle. You have new effects, but not a wide-ranging set of effects. Melee was really the big thing out of Champions. Imagine if the next set added a new keyword for every house. That would shake up the meta like an earthquake I would imagine. Now maybe you don't have to worry just about Ambush out of Targ, but also Intimidate. I believe MtG subscribes to this. Each cycle has a bunch of new keywords splashed across all of the cards.
More and interesting keywords would keep the card pool more interesting for me. It forces a re-draw of the entire card evaluation process. Right now, the CPs don't shake up the way I evaluate cards. They simply add new cards that I evaluate the same old way.