Similarly a profit switching pool could assign, say, 2% permanently, just in case.
True, this is the one flaw in the coin.
But lets say there are 2 pools that are "holding back" hashing power until the the right moment. As soon as one pool adds more hashing power it would throw off the others calculations thus changing the probability of generating an anomaly. Everyone would be jumping in and out trying to raise there probability which would make predicting the difficulty near impossible. So I think we are fine for now. As far as solo mining goes, yes the person with the highest hash rate will (potentially) generate more anomalies. But like you said, if you were to somehow "throttle" your hash rate to manipulate the difficulty you could generate a lot more anomalies.
My laptop will do nearly 7 kH/s maybe that is the tool for the job ...