During the stretch, the frame of the plant will "stretch" rather than grow any new stems, and what is close and dense now, may not be once she grows out, you want everything close and as dense as possible during veg, this is what makes dense clusters later in flower, the plant is growing to the rate dictated by your environment, she looks beautiful and healthy, keep doing what you're doing, the only time you want to think about defoliating is just after the stretch to open up canopy or clean up any overlapping from topping, truth be told the plant defoliates itself later and will reallocate nutrients within a leaf before detaching it, this way there is little to no waste, any time you take a photosynthetically active leaf you reduce total potential capacity. Nature and the code that runs underneath is far more intelligent than we are, let it do its thing.