No, what is relevant is the Constitution and Laws at the time of Sen Cruz’s birth. Remember that the Constitution is modified by Amendments and the naturalizations acts have been repealed and replaced many times since 1790. For example, a woman no longer looses her citizenship for marrying a non US Citizen.
Again, the current will of congress and sum of all laws statutes, amendments etc is expressed in USC Title 8 section 1401. And as you pointed out, ONE of the ways that citizenship is obtained at birth is being born pursuant to subsection A on US soil. That is how the majority of citizens who are citizens at birth obtain their citizenship. But that is not the ONLY possible way. Subsections B through H define the other means by which a person is born a citizen.
your ignorance is astounding!