I think the shot is pretty awesome, love how clear that lightning fork is darting from the cloud to the buildings!

Now on the one hand I think you could colour shift it slightly so that the sky is darker and more ominous and the buildings aren't so washed out and bright (maybe do something similar to the blue one, make it slightly darker and then up the contrast) to make it more "epic" looking.

On the other hand I think you've done a brilliant job capturing that very brief bright like a nuclear holocaust retina burning moment that happens when the lightning actually strikes before the world is plunged back to normal lighting, and that it's fine as it is :)