I think that's my biggest concern with the proposed changes; no-one really knows how they will play out. There's a lot of game theory when changing the reward incentives. I would like to see small, and more frequent changes, one element at a time, so that we can see how each individual element acts. However I aappreciate that administratively that's a pain. Hopefully with SMTs there will be a range of reward incentives trialled, speeding up finding a solution which works best.