Nothing special about RUH, I flew there for 19 years, 10 on the MD-11 and would say very benign.
When I did MD-11 line training we were lucky enough to fly with the ex CP of EVA, who mentioned that Saudia bought their MD-11's with dual main gear shocks, which was an option. Anybody hear of this?
I saw some firm landings, but no bouncers which seem to be the kiss of death on this thing.
"Dangerously high sink rates" are not endemic to RUH, this is what we get paid for day in and day out.