Fr. Hunwicke has an excellent post that makes the case that some sort of canonical status for the SSPX should be desired by all, including Bishops.
Nothing is gained by the present situation between the SSPX and the ‘mainstream’ Church. Absolutions are given and Marriages solemnised which are of doubtful (or if you prefer it, doubted) validity. Who gains from maintaining that situation? If some piece of canonical ingenuity, without necessarilly granting full faculties to SSPX clergy, were at least to eliminate this particular pastoral anomaly, who would be the loser? Would a shepherd who achieved this end not smell of his sheep? Would this not be Merciful? Is the SSPX not a Periphery as deserving to be reached as any other?
The SSPX can currently set up a Mission in an area where the local bishop may have well-founded reasons for prefering this not to happen. But because of the present situation, there is nothing he can do to prevent it. Paradoxically, the Society, because it is deemed to be canonically non-existent, actually has complete freedom of action! So how does the bishop gain from this situation?
Amen, amen, and amen!!