I doubt the chances have changed, so it'll just be one click more to get to your SD+ O: it's funny though, you buy a CI, to get an SD+BB, to get another SD+BB to open for your item... I think I would get annoyed if I didn't love dolls XD not that it really matters, I got so burnt with the boxes I did opened that I swore to never open another one x ox the year with Thea will probably be the most expensive XD but I think each year has it's set of super rares right?
I would like to know if this is also going to affect content specific boxes? For example the Adventure Time box. I would be super upset if I opened that and got some random unrelated doll just because it was released the same year.
Dolls Will no longer be listed here, due to each doll being listed in each CI, and off the above link for order. That and there were so many dolls, it was exceeding the post size limit.
UPDATE: From Pepper-Tea
SDPlus Box Change
Hello! Just wanted to let you know, SDPlus Blind Boxes now work a little differently than they used to. When you open an SDPlus Blind Box you'll receive a package with a year on it, and that package will contain an SDPlus doll from the year listed. This affects all existing SDPlus Blind Boxes you may have in your inventory, as well as the ones you may receive in the future.
This was done due to a technical limitation of the system, but it also makes it easier to find the SDPlus dolls that you are looking for!
The technical issue is likely the number of dolls exceeds the database limit of the chance items. This allows for a 'box in a box' effect, essentially making it so instead of 300 items being able to be listed, this CI can have 90,000 different items.