I would clarify that the 50% rebate is on 1 airline that you choose in the beginning and that some people have had success changing it but YMMV so choose wisely. I would also clarify that they deduct the entire amount of points and then add half the points back so you must have the entire amount of points in your account.
Freedom unlimited offers 15,000 points and an additional 2,500 for opening an AU, the way you worded it, it seems like you need to add the AU to get any points, same for regular freedom.
Also SR doesn't need to add an AU for the sign up bonus (it's actually probably a bad idea
)
Other than that, everything looks good.