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I'd recommend trying to keep the discussion to a minimum so that the thread doesn't go off track - just sticking to the basics of how many of your keywords have been destroyed, the %age increase you're being expected to pay, and - most importantly - the total amount of money you won't be spending on AdWords now due to the changes. Based on what I've seen so far ... it's in the millions already.
Adsense is not the only revenue for the site, I do have affiliate ads too. They are half the monthly revenues.
Since the site is advertising supported, there is nothing to sell, so I will have to rethink the whole thing now.