For some more possible insight into the damage to the RKBA done by this decision see the analysis here:
http://joshblackman.com/blog/?p=4861
http://joshblackman.com/blog/?p=4869
Also discussion on Volokh Conspiracy legal blog
Basically the 7th circuit seems to have adopted the view of the minority in Heller and McDonald and applied a balance test just like Justice Breyer wanted and as was explicitly rejected by the Majority in their rulings. This essentially sets a precendent that could justify almost all gun control laws.