https://www.cryptocoinsnews.com/charlie-lee-proposes-merged-mining-ltcdoge/ I think most of the arguments for Merge mining can be found in the link.  Although FRC is different in the Demurrage the fact that it is a BTC derived coin I think most of the arguments are valid. Also given the latest Denial of Service by some group that is hell bent on burying the difficulty so high that it may never be recovered unless it is merged mined with BTC seems to be the plan. I