Sort:  

Yes it will happen slowly over a period of time.

Also, there is discussion to have the @steem.dao HBD balance not be processed during the debt calculation.

Cool, thanks for the info. And good news on the debt calculation discussion as daily printing of HBD for DAO in itself already represents a massive amount of debt.

So only the HBD that is in circulation would count for the debt ratio?

That's a possible implementation, yes. Still needs to be discussed and modeled.