Hello! Tried out the BlastFX software and it's very good at making particle like sprites!
There is one idea in mind that would be something worth checking out.
I dub it: Pinpoint Keyframes
Pinpoint keyframes is where the user can place marks on the timeline so then it would make the play-head instantly snap to the nearest pinpointed keyframe for a controlled, animated sprite. Just for creative reasons.
Maybe make a change to the spritesheet export too so then the exporter knows what frames to export based on the pinpointed keyframes...
BlastFX has a LOT of potential!