So your criticism is actually in the context of ICE and PHEVs - I assumed you meant pure EVs since that what this thread seemed to be about, and for those autonomy numbers seem to be strictly lower, hence my confusion why WLTP would be more doctored in this regard than NECD.
I have looked at the Model 3 and Hyundai Ioniq and even there the energy usage seems to be rather off. 15 kWh/100km WLTP vs 19 kWh/100km according to spritmonitor on the Model 3. 11 vs 14 with the Ioniq.
So yeah, it seems like WLTP is not really accurate for EVs either.