First of, YES they got rid of the lethal force cause, which didn't seem to be followed anyway at the expense of Jack T chance.
What i'm going to say is there a few things. Ranx can't be destoryed because they moved to bring it back it later days as it well destory Oa when Sodom Yat gets a mohawk.
Secondly and I'm sure you old Gl fans well love this nerdiness, I don't beleive Amon Sur is Abin's Son. If you would recall Tales of the Green Lantern Corps he found a little boy in the empire of tears and took him in, some years later he died.
In Amon's retelling of his life he is about four or five when his father dies, easyly a few years after finding this boy and taking him in as his own.
What do you all think?