1) Currently it's not possible, but it's something that was brought to my attention before, I will look into this ^^
2) it only operates between 0~1, the reason is that for performance reasons, the filter area is shrunk down to a very small area I have already expanded this area, but 0~1 represents the area that this filter fits into, I apologize for the inconvenience u_u
3) This filter can actually produce a wide variety of patterns, I opted for a more "fire" like effect, but a water effect, may also be possible, as it operates with FBM( Fractal Brownian Motion ) to create these effects. I can look into it, as for lightning, this is not something the plugin can do without making large alterations, BUT I have been looking into creating lightning effects via GLSL, so this may be possible in a future update, maybe.
Also your action sequences look great! Keep up the good work! I just subbed to your channel I'll keep an eye out for more neat action sequences! :)