Caspa was one of the first guys making dubstep before it was dubstep. Not saying that excuses a weak track (and the original Day Is My Enemy track was repetitive as shit), but you might want to do a little research before you assume he's just like Skrillex.
Open any music production suite and see how much of a pain in the ass it is to create GOOD electronic music. It takes music theory knowledge, technical artistry, and a shitload of time. I've been getting back into it and I'm not surprised some artists just tour around for years before releasing new tracks.
Like any professional tool, one does not simply create top 10 hits from thin air.