I think you guys are reading this wrong. (Admittedly, this section is even more poorly written than the rest.)
I'm pretty sure that what it is saying is that the HD add-on will no longer be considered a premium package. (Nor will the "250/Gold/whatever" add on, because it won't exist anymore.)
This really should only be a big deal if you JUST have HBO. And, as it says over and over, you can always stay with your current pricing/packaging.
Disregarding whether or not we will still get the $3 DVR Advantage discount (which was temporary anyway), here's how I see it.
Best case scenario...people who are already paying for everything (or almost everything) can save $10 a month.
Worst case...someone with DVR Advantage Silver, HBO, 250/Gold/Whatever, and HD calls to get the "free" platinum channels, and loses their bundle discount. Their bill goes up $4.99. With other combinations of premiums, they might be able to get the platinum channels for $1.99, .99, or even free. No matter the case, they would be getting something that used to be $10. And no one is forcing them to do it.
The reason this looks complicated (aside from the poor writing) is because they are UNDOING some of the complicated rules they already have. They have to explain how those changes affect the currently insanely complicated fee table.
To a new customer, the pricing will be much simpler than it was (though still not simple enough). To existing customers, all you have to do is nothing, and everything stays exactly the same. What's the problem?