To the degree that all of it is solidly grounded in the Churchs teaching and her discipline, I believe it will be very positive, he said.
http://www.catholicnewsagency.com/news/cardinal-burke-media-hijacking-synod-on-the-family-79760
His words imply uncertainty. If he truly believes that the Pope will clearly and absolutely oppose any erosion of orthodoxy, why would he make such an equivocal statement?
He did so because, when human beings are involved, nothing is certain. It is wisdom in his framing of words. Cardinal Burke has great wisdom and courage.