TBLA Calculation of Cx Savings

Hello - one of the newer features of Autocase is the calculation of commissioning savings.  My question for others is are you finding these savings seem overstated?  It feels like a flatline percentage of energy consumption applied over the life of the building when we know system degradation and recommissioning must occur every few years to maintain performance.  Maybe that's a built-in assumption too, that by the LEED credits requiring the development of the ongoing cx plan there are maintenance teams keeping the building tuned?