SSPX supporters should consider a few things. First, recognition and regularization is a matter of justice. Given without pre-condition and then rejected because they don’t like/trust the current Pope is to make a schism where there was never one before.
Secondly, it is only because the Pope is who he is that such an unconditional deal is even possible. If Benedict had offered the same terms, it would have caused a civil war. We must trust in God that He brought us to this good moment even out of the evils of the day. You simply cannot say no to such a deal without breaking with the Church. Then Trust God and be on guard.