In case you missed it, the folks at Rorate Caeli ran an online poll asking the question, "If Francis offers a Prelature to Society of St Pius X (SSPX), should they accept it?"
The results: Out of 1,093 respondents, 77% voted yes and 34% voted no.
No doubt there are a lot of people out there who think that getting the FSSPX into the formal structures of the Church will be a great boon to orthodoxy while setting aside the distractions of questions regarding schism and jurisdiction and all that. Though I would normally agree (though I've read and agree with many who've argued a prelature according to the Opus Dei model is the wrong way of doing it), we are not presently in normal times.
After following the tragedy of the Franciscan Friars of the Immaculate and now reading more about the new MP dealing with women religious, it's clear enough the Holy Father and his coterie are not to be trusted.
Bishop Felley and those around him really need to consider what their options are at this point. If they make a deal, once that bell has been rung, they won't be able to unring it by walking out if the deal goes bad.