I have been staring at that cluster fuck of leaves in and around the top third of her. Its getting tangled and even though its green, I think that a little trim can't be bad. Just stay away ffrom thicker stalked leaves nad take off moderate ones.
Pros'
More light more flower
Less leaf for crystals to become attached to.
Less leafy buds
Less trimming at the end
Less flushing at the end.
More yield
more air flow ( we're out side growing, that's not the man concern, light penetration is)
more room for buds to grow
less energy wasted on providing to useless leaves.
I have thinned a bit so far adn not gone crazy. Generally if the plant has absorbed most of teh leaf and its now whitish, I cut it. If its green and small and in the way, I have a good look.