The orchestral parts are absolutely fine; however, the drops are a little too messy (Sound design and mixing). Also, the bridge is a little empty right before second build up (the constant lead around 3:23 gets a little irritating and it overpowers the drums). Try to ensure that nothing in the mix is trying to overpower another sound (etc.). The snare choice is a little strange but seems to fit decently during the first drop. The second drop melodies are kind of strange in my opinion. One other detail that is crucial is ensuring that your drop effectively impacts without sounding harsh (which can be accomplished with better mixing). Try to include more drums than the kick, hat and snare during the drop for more tension. If you want to classify this as orchestral dubstep, it will need more orchestral aspects throughout the drop (without colliding with the dubstep sounds).
Work on your sound design and mixing (these are what all musicians strive to improve) and you will become quite awesome at electronic music production.
Good luck! You improved quite a lot so I wonder what will come from you next..
-ChaelMusic