I made a couple of simple calculations because I was curious too see how often RADS is (are?) decayed. I came up with a rough number of 10/20 coins a day (average for the last 10K blocks, taking into account an average of 40 orphan blocks a day). Is that a reasonable assessment? If this is true I think that having the 1.5% of the daily mined coins decayed is not so bad.

Hi! I just added some more information to the wiki about decay, let me know how I can help clarify it any more. Having written the code, I sometimes assume things make more sense than they do.
https://en.wikibooks.org/wiki/Radium_SmartChain#Radium_DecayJJ