Perhaps there is a possibility of an acceleration rate check, based on ambient conditions and groundspeed, driven by GPS/RAAS and triggered when the TO/GA switches are pushed on departure? Something for the boffins...
Now that might work, but I go back to a point I made earlier - it would still have to a calculated point based on inputting the same data, hence subject to the same error.
Would guard against P1 malfunctions resulting in lower than indicated thrust though. EG The 737 in Nauru or the Potomac crash.
Nice one centurian!