More on this week's motu proprio Ecclesiae Unitatem

Yesterday I asked AmP readers to help me understand Ecclesiae Unitatem, the motu proprio issued by Pope Benedict on Wednesday. In addition to the good comments left there, one tipster sent me a short-hand explanation which I found useful:

Don’t you think that the Holy Father simply wants to separate the two parts of the SSPX controversy? I.e., the liturgical and the doctrinal. By separating them, he can mainstream (even more) their liturgical desires through the CDW, while continuing to study their doctrinal concerns through the CDF.

Fr. Z also wrote a very helpful analysis.