This Étude is insane, how wide is your hand? 11th? I can't imagine how Scriabin hands were Well, I think that in some parts it could be more passionate and crazy and there could exist a major difference of dynamics. I mean, the piece is in a continuos crescendo (f -> ff -> fff) and If I were you I would try to stand this out a little bit more.Anyway your work with this beast has been great!! Congratulations!!
I think in order to give the piece more momentum you should play the ascending semiquaver notes in the main theme a bit faster, same thing with the semi quavers before the dotted quaver notes. Sometimes you hold back a bit too much with them, same thing with bar 26-29. I hope this helps.