There is a larger problem with the 1.6 that nobody seems to address. It does not matter what you give it unless the owners actually put it on the car. You're going to end up with a very few amount of the 1.6's with the update. We tried to give the 1.6 the '99 front subframe a few years ago and that got negative response from the membership, the good news is the current SMAC and Current CRB don't ever really send anything out to the membership anymore, they just make changes.
Sean, the lighter flywheel does allow the motor to spin up faster but it doesn't make any more TQ. More TQ comes from a bigger boom. You need more air to make that happen. You can solve that with a cam, but adopting one that is commercially available that people will buy is not a viable solution. The 1.6 AFM is the bottle neck. It flows less air than the throttle body.