Regarding the Rukon situation, I think a solid 7 is in order.

Masaru should, in fact, be allowed - encouraged, even - to improve the situation of Rukon. (As I previously mentioned, not doing that is treason by omission. ) But between the recent upheaval and the amount of studying he needs to catch up with, the changes of Rukon will take centuries to be fully felt and appreciated, assuming he even lives that long and the Nobles play nice.

Again, changing the law sets a dangerous precedent of allowing one Noble House to use Rukon citizens as pawns against another, so it's not in their best interest to do that either. And Masaru would be fighting an uphill battle either way, because all it takes is one uppity member of the upper class.