Can I say that your 1 is like "Letting your opponent choose if he wants to see the pieces"?
Then you have several scenarii:
1. If you and your opponent don't choose to display pieces, rating will be updated whatever the result is
2. If the opponent decides to see the pieces but not you, your rating is updated only if you win. Opponent's rating is updated if he looses but not if he wins.
3. if you and your opponent decide to see the pieces, rating is updated whatever the result is
I really like the blindfold variant since I've been trying to learn to play blindfold for a while. There are a couple ideas I had that would make me like it even better;
1. It would be great if there was a way to play blindfold games in the normal pool not necessarily against a blindfold opponent. (I know there's an option to have blindfold piece set, but I also want to have a separate rating when I play blindfold so I don't tank my normal rating).
2. When blindfold variant was newer, I could see the whole move list even though I couldn't see the pieces. I prefer this because the challenge for me is visualization not memorization and it creates in my mind an unnecessary added difficulty. It would be nice to at least have the option of still allowing the normal move list to appear.
Just little complaints, but overall I am very impressed with the new variants and Blindfold chess in particular.