I guess that first you will have to resolve some conflicts :)

It is great to see community members who open pull requests on the Steem github, it helps its growth!

And as a question, you have written:

• When the STEEM/SBD debt ratio is between 0% and 9%: 0% STEEM, 100% SBD.
• When the STEEM/SBD debt ratio is between 9% and 10%: linearly change from 0% STEEM, 100% SBD to 100% STEEM, 0% SBD.
• When the STEEM/SBD debt ratio is greater than 10%: 0% STEEM, 100% SBD.

but at the end shouldn't it be:

• When the STEEM/SBD debt ratio is greater than 10%: 100% STEEM, 0% SBD.