You need to watch your use of repetition. What I could suggest is: for the introductory arp, try "evolving" it with some kind of automation. For the second half of the song, this is really where it started to become monotonous. You could do the same thing as in the intro, or use a similar, but different lead along with the current one, or make the melody less repetitive. Or all three. I don't know how long you intend to make the song, so really it's your call.
Also, I agree, that sweep needs to change. The transition there also could be a bit more pronounced. I feel like there's no contrast between those two areas.

-Annie