You are right that with this LCG business model, FFG has to continue to churn out hot potatoes, often times this means new mechanics, in order to maintain the interests of its consumers…especially its monthly "subscribers". The next CP cycle, the Kingsroad is a nice refreshing change in that as we know so far it is a revisit to the past mechanics (other than the new way of viewing board position a la "in your command"). I hope that supporting past themes, especially those that are viewed as weaker themes, remains a sticking trend going forward. The uncounterable mechanics you mentioned may generally be something the designers hope that the meta itself rapidly adapts and corrects with some newly introduced cards that nudges them to balance. At least, an evolving self-correcting meta philosophy was the gist of what I got from the 2012 Damon Stone interview by TC. But sometimes it just can't be helped and the nuissance needs the BER stick. With all that said, I still think there are strong similarilties in thoses 3 mechanics with cards jumping from X to Y, as mentioned above. Maybe that is the natural progression of development for a card game with heavy emphasis on unit management (Magic's Old Aggro?).