Well...it sounds like they’re trying to preserve the status quo without outright rejecting the conditions.
It will be interesting to see how the Vatican responds to this. They have been very patient thus far.
I think Fellay probably couldn’t get the hardliners to go along with him. I’m not sure he was 100% for it, but I think he might have been a little more willing if it was simply up to him. On the other hand, the odd thing I have noticed is that the attitude of the SSPX actually seems to have hardened a bit since the Motu Proprio. You’d think they’d have been happy about it, but they almost seem a little threatened to think that the old Mass might someday be commonly available to any Catholic, without SSPX involvement. Interesting, in any case, and I hope they rethink this.