"rather more surprisingly" is a correct and usable phrase in written English.
For example: "The experiment yielded unexpected results, but rather more surprisingly, the control group showed a higher success rate than the experimental group." In this sentence, "rather more surprisingly" is used to emphasize the unexpectedness of the results. It can also be used to introduce a surprising or unexpected contrast, as in the example sentence.
Anthony Martial has been quite successful on of the left, and rather more surprisingly Juan Mata has been getting a run of games instead of Mkhitaryan on the right.
Rather more surprisingly Jonathan Trott did the same, before Anderson's dismissal brought smiles to a remarkably full Lord's (20,000 in the ground to watch Bangladesh is quite a marketing achievement) for figures of five for 98.
14 mins: First Mark Cueto and then, rather more surprisingly, Simon Shaw make big gains through the defensive line, but possession is wasted again by the Lions, who are failing to capitalise on keeping Auckland pinned on their 22.
Just as Eliot and Heaney, when imitating Dante, chose not to copy his rhyme-scheme, so Auden (but rather more surprisingly) chose not to try to rival Byron's ottava rima, but to shave off a line and use rhyme royal instead.
Conversely, Martin Scorsese's clerical passion project Silence found itself excluded again (though star Andrew Garfield was nominated for Hacksaw Ridge) – but rather more surprisingly, so was interracial-marriage drama Loving, whose two leads, Ruth Negga and Joel Edgerton, each received Golden Globe nods.
Rather more surprisingly, we found an alteration in the ability of Vipr2−/− SCN tissue to maintain a consistent circadian phase when cultured in vitro.
Not surprisingly, conservative news sites made rather more of the story.
Nearly as pleasing as Obama's surprisingly easy reëlection — and, to me at least, rather more surprising — was the electorate's nearly across-the-board embrace of cultural and social liberalism and, implicitly, of secularism.
Much more surprisingly, the strength of divergent natural selection between competitors was increased rather than diminished in ponds where mortality was high.
More surprisingly, skepticism of the league's future came from a current player rather than a retired one or a member of the media.
So, more surprisingly, does Jim Courier.
