I imagine the height of the panels is important to allow cleaning, but they could perhaps try more to combine the solar infrastructure with any fixed elements that would help the plants - irrigation lines, grow/heating lights or pest deterrents, rails for picking carts, etc.
I recently toured a very advanced tomato greenhouse system where a heliostatic field, solar tower and turbine generated the power to cool/heat the greenhouses and desalinate water for irrigation. The heating pipes doubled as rails for the scissor-lift carts used by inspectors, pickers, etc. They had navigational lines embedded in the concrete flooring so that they could fill a train of carts with tomatoes, and then program a destination for it to self-drive to.