Well so long as having (and therefore paying for) Premium Membership remains optional, I can't see there is a whole lot to complain about. Either you pay, and make use of the features such as PQ's (personal opinion is these are very useful especially now I have gone paperless) or you don't become a PM and continue caching as you have chosen.
If Jeremy had decided that the fee was going to increase instead of a few ads, then I am sure there would be a lot more hoo-har about it. And if there's going to be an "off" button for the ads...use it!