I'm not entirely sure I understand what you are saying about your impressions. However, on average, when I'm running a PL campaign, I'd guess about 80% of my impressions are PL, and about 20% organic. By retaining 1.1% you ensured that your PL impressions would all but vanish on the 11th or 12th. That was clear from ebay's announcement: existing PL listings with less than 2% would not be shown as PLs after the change. (And, of course, now when you go to create a new campaign, you can't choose a number less than 2%)
So, if you are concerned about the drop in PL impressions, you can start a new campaign at 2% or higher.
I think most sellers would agree that the increase in the minimum from 1% to 2% is of no benefit to sellers, and is designed to increase ebay's revenue with virtually no effort on ebay's part. This is also true of the change in how the PLS rate is calculated: from item price to item price, shipping and sales tax total is a significant change, and one that is designed solely to benefit ebay's revenue, with little effort on ebay's part. It has no benefit for sellers.
Of course, these changes could backfire on ebay, with sellers reducing their use of PLs or eliminating them entirely. But I think ebay is confident sellers will continue to use PLs and with these two simple changes ebay has ensured itself a nice bump in revenue without any real work.
As a seller, I'm not happy with these changes , but ultimately I have to decide what is best for my business. And in my case, I will continue to use PLs (although probably at a lower rate than I had been using, and probably more selectively). I will also look at alternatives, such as using social media to drive traffic to my listings , as well as alternate selling platforms.
