Here are the wt errors:
They declare the new covenant to be only for the priest / kings, whereas the old covenant was for all of israel, not just the tribe of judah and levi. the new has to follow that pattern imho.
They declare the partakers to be the israel of god, whereas in many places the 12 tribes are all the believers, not just the sealed 144 000. wt itself says that the 12 tribes are the non 144000.
jesus passed the bread and wine to believers with an earthly hope, not anointed [yet].