I seriously doubt Trump would appoint Cruz to anything if Cruz drops out.
Cruz’s best chance is to continue to pursue the nomination and try to pick up as many delegates as he can. If he drops out, he gets none, has no bargaining power, and Trump won’t do anything for him.
Beck called Melania a lesbian porn star. That was the day Beck was dead to Trump. There will be no recovery for Beck who has continually tried to get Trump on his show.