I have the newsfeed (which I have set to auto prune every month - I will reduce this now) and the gmail extensions.
No, I have not played with flags, afaik.
I like the continue where I left off feature.
Bit of a pain this, but at least I know where to "fix" it now.
I'm very sad about this Opera's suicide marketing movement of killing "Presto" version to be another Webkit fork.
I can understand the change to a new render engine, but not to remove all the original and usefull features that make Opera a different and better browser.
Personally I will keep Opera 12.16 as much as I can, but the world is moving. The last Wordpress release make Opera 12.16 unusable to edit new posts, so I'm slowly moving to Firefox, not to the new Opera, because there is no a single advantage to use it.
I'm a Opera user since 1996, I was a pay user, I would be willing to pay up to $50 a year to have back the lost features, but, you prefer to throw all your loyal users in the garbage.
Good luck with your new policy.