There is little point in measuring the transmit current then, for range testing\conformation you need to know the actual transmit power.
You can measure the actual RF power on the LNAPA modules and then use that to compare the range of the modules with the PCB trace antennas, but its not an easy task.
If a 'good' module has a range of 500m to 800m and another has a range of 150m, assume its bad, there are unlikley to be magic voodoo settings that will make a bad module good.
If its important that you have a reliable long range, then dont use 'cheap' modules.