I went ahead and circled what I didn't like, which was the flow of your piece. it's a great piece, but the flow is killing me.
The yellow lines are the direction in which I think the flow is going.
The black circles are where I think it messed up.
The first one, in the top right corner, that white/yellow light that just arcs to the top left. Maybe smudge it to the right and in the direction of the flow?
The other circle, those blue swirls, need to go. They start off going in the right direction, but end up going somewhere else.
Very nice piece, just the flow bothered me