I mean you could remove some of it, either remove some of the fan leaves covering the lower bud sites so they can get more light, or alternatively remove the lower bud sites that are in shade so the plant focuses on the top, be careful not to remove too much though, I usually go by no more than 20% rule but im sure people vary. Either way, I personally dont really think its that bushy or needs much defoliation if any, if it was me, id do some LST with the main stem, get it lower, and let the lower branches catch up. Good luck with the grow mate! :)