Bishop Schneider had a very interesting proposal a few months back. He suggested the promulgation of a new "Syllabus" mentioning specific errors in interpretation of the Second Vatican Council, and reaffirmation of the corresponding doctrines affected, in accord with Pope Benedict's suggested "hermeneutic of continuity".
If it is true that the SVC defined nothing really new, and it is also true the SSPX believes everything taught before the Council, it is clear that there can be no real difference of faith. I believe there is an orthodox interpretation of the Council and now is the time it needs to be stated, to the universal Church at large.
The people who really need such a notification are the ultra-enthusiasts on the left who genuinely seem to think, often without having read it, that the Council legitimized everything from religious indifferentism to universalism, and furthermore removed the need for pastoral discipline and sacramental reverence along with discipleship and evangelism.