If it isn't this, it will be something else.
It always is.
As with Lefebvre, so with Fellay and all the rest.
No bishop who has been his own Pope for close to 20 years is about to summon forth the humility and obedience it would take to go back to being a bishop.
There will ALWAYS be ONE MORE REASON WHY NOT.
Period.
Speaking of humility, I recall reading the story of an event that occured during the late pontificate of JPII. (sorry for not bookmarking the link!) It seems that on one of his visits to a Church in Rome, JPII recognized a dissheveled man in the crowd. He was a fallen priest (missing these details :-( Upon his return to the Vatican, JPII asked one of his aides to track down the priest and extend an invitation to dinner in his private chambers. The person was found, assisted in getting cleaned up and attended the private dinner. At the conclusion of the dinner, JPII expressed the need for priests, to the man. He then asked him to hear his confession! Now that's humility!
I've probably messed up the actual status of this priest but not the humility of JPII.