See how the top few sets of leaves are so tight together that it actually causes some to angle upward from touching each other -- that means you had the light a bit too close or amped up too much... It wouldn't have been as small of a plant, otherwise. Usually i wouldn't say such a thing with utmost confidence, but this one is pretty obvious even in pictures from above.
So, this will have a domino effect when you fix it... if there were any leaf symptoms progressing on the top portion of plant, expect those to either abate or at least slow down. I'd fix the light before adjusting your formula relative to any visible symptoms.
You don't have to select my answer. I am not participating the contest.
Normally i wouldn't recommend removing any leaves, but because of how tight everything is, you may want to de-clutter the central area... be systemaic about what you remove... try to spread it out evenly among all nearby branches. Don't go overboard. Don't create gaps in canopy where light travels through it without hitting a leaf.
the stuff that faces inward from multiple branches is the stuff i'd focus on and altenate taking off leaves at any 1 particular level of growth nodes and work your way up rotating where you prune so it leaves no gaps.
unless other areas have a ton of overlap and causing constant condensation, i wouldn't worry about the stuff pointing outward -- even if slight congested. LEaves are your friend and they are important to keep. Never remove one without an excellent reason or it's just shooting yourself in the foot.