Well, not sure what's been improved from the previous version. Looks too simple to me. Ya can definitely do better than this because you've been mostly creating ability icons.
There is no objects, no details, which leads to cartoonish style. There is no emphasis due to the lack of proper contrast, no actual motion representing the beautiful movement of an icon. I see only some linework pulled forward, can't really connect this with any sort of subject, explosion here.
Perhaps that's just me, but surely you can do better! Still, it's moderated and I just thought it wouldn't hurt to express my opinion. Best of luck!