Believe me - I understand!
If you go to this link:
and then go thru some of the options on the side menu, you'll get all the real details Ina's cheatsheet leaves out.
In particular, read thru the FAQ.
I think this might be the most thoroughly explained policy update in Ebay's history. There's a lot to absorb - but they have provided an incredible amount of detail - even examples of how the DSR's will be calculated. There's a lot more here than in previous updates.
I'm not sure I like all the changes, but at least I can't fault them for not explaining them (this time).