Fears that the clarification document will water down Summorum Pontificum

Here are two good blog posts summarizing what is known to date regarding the "clarification" document:

Ars Orandi: Fears that the clarification document will water down Summorum Pontificum
English Catholic: Summorum Pontificum threatened – or is it?

And of course, level headed advice from Fr. Zuhlsdorf at WDTPRS:

An initial comment concerning the Instruction about Summorum Pontificum

... If you are concerned about what might happen to Summorum Pontificum, pray and fast.  Don’t whine.  Don’t panic.  Don’t fret.  Don’t behave like a suddenly headless chicken.
Do what a committed Catholic warrior would do for a cause that is dear.

• Go to church and spend time before the Blessed Sacrament every day until this resolves one way or another.
• Ask Jesus to either stop the Instruction or to make Summorum Pontificum even better.
• Pray the Rosary for the Holy Father.
• Ask our Blessed Mother to move the Holy Father to keep Summorum Pontificum strong, to make it even stronger.
• Pray to the Holy Father’s guardian angels constantly during the day asking them to strengthen him and to weaken his many enemies, some of them very close to him.
• Fast and offer your hunger – real hunger, don’t fool around if you are going to do this -  for the Holy Father’s well-being and firm resolve.

Be prudent about fasting, of course, especially if others rely on you and you have health concerns.  But if you are young and healthy, fast.

If Fr. Z. is strongly recommending prayer and fasting, then one could safely assume there is reason for concern, no?