Let me just disagree based on the idea of having a majority of the delegates.
To win the presidency, the candidate MUST have a majority of the electors in the electoral college. The convention mirrors that by requiring a majority of the delegates. If they don’t have a majority in the electoral college it goes to the house of representatives to decide. That, too, is mirrored in the convention.
So, why did they want the winning presidential candidate to have the majority of electors in the electoral college?
Because that demonstrated broad support across the population.
I have no problem with it.
If Cruz can pull off a convention win, then that’s on Trump. He knows the rules, too, and he needs to be preparing.