It is what it is. There is no secret to making them better or operating them more efficiently. They are a passive device. There is some advantage to continuous tilting but this can become a maintenance nightmare. You must be diligent monitoring and maintaining the supportive equipment, which can be very costly.
This won't be the flavor of response probably being expected... The only way to improve on PV as an energy source is to stop using it... We will unfortunately find a dramatic reduction in demand for PV power as we systematically (translated systemically) poison our ground water with the toxic byproducts of making more and more PV cells.... it is tantamount to the effects of cancer that grows and grows until it kills the host... concentrated solar-powered devices like free-piston Stirling Engine Generators (other than direct insolation methods such as windows and skylights) will be the only sustainable route... in fact, we can clean up the waste emissions from oil fields, landfills and rice paddies using gas-shift reforming thermo-chemistry powered by very-high-temperature (1500 C) CSP to make liquid fuel and electricity at the same time...