I've read it through, and I'd say the jumps are much more difficult than the arpeggios for me. I'm really not sure whether I should tackle it or not, but I have to say, Chopin's Ballade no.1 was a piece of cake compared to this in terms of technicalities. Musically, I want to say that the ballade is more difficult, but I could be wrong.
And maybe its just of my age group but among the people I know, 2 people have played the Mephisto waltz recently and I'd say about 10 people have played Chopin's Ballade 1 recently (as in within the past 2 years.