Pilots don't know what the roll capabilities of their aeroplanes are- with zero flight time simulators all the rage, most never have to fly the aeroplane without passengers anymore. It may be shocking but true- the first time you fly your type will be on passenger service with a trainer supervising. Certainly passengers don't like roll rates of 30 degrees/second or whatever they can produce- in 34 years of flying jets or turboprops I never had an idea of what the max figure was, but knew it was pretty good for the size aircraft I was flying.
IMO flaring is much, much less than 10 degrees second. I would say it was anything from zero (hard landing!) to about 1 degree second. On jets a flare to just a couple of degrees should put you down nicely. You have only been flying a 3 degree glideslope, so about a 3 degree flare will put you horizontal. Add in ground effect and slowing up a bit- all is needed is a little flare done gently.