It does not appear to me that Trump has anything remotely close to the campaign organization that Cruz has. What then will Trump do during the general election? It wouldn’t be the first time we lost the election to the Demo ground game.
I think it is very important to get a candidate with a good to great ground game. Cruz is there now.
Cruz’s ground game is built out of necessity from failing to convince people to vote for him. I would rather have the voters.