If I remember correctly, the usually well informed Not a Boffin responded to this "rolling vertical" idea with the statement that he would (on balance) prefer an intimate encounter with
to a shipboard RVL.
Something about rolling on a wet deck with no brakes, engine spooling down, nozzles down, and no barrier.
The lady awaits, Mr Boffin.
By the way, WEBF, it's a positive step if it's really to enhance performance and not just to make the brute achieve its KPPs at all.