[reset accounts]

I don't have a view on the reset feature as long as it is opt-in on existing accounts. Unfortunately this means if you lost your key in the past you are still SOL. But I don't want to see accounts subject to a crippling exploit as you put it, because because the account owner doesn't realize they need to disable a new feature on every single account (many people have multiple accounts, and I'm not even referring to sock puppets here, but accounts used for non-social purposes, most notably cold storage). On new accounts it can be up to the account creator, I guess.

If there are other issues with the feature they would need to be discussed. I don't know what they might be.