I'm sorry, but Cruz staying in is the only gambit the GOPe has left, which is why they are backing him, but they will stab him in the back as soon as he walks into the arena in Cleveland.
They might, but why condition your choices on that premise? If the GOP-E jobs everybody but Yeb! or Rubiocito, then they job people .... If I prefer Cruz, why should I switch to another candidate because the GOP-E or Beastwoman might pull an Article II/NBC lawsuit out of their capacious butts, when they haven't done so, so far?
Do you expect Hillary, between now and October, to be able to get Cruz removed from ballots in 25-30-40 States, if he is the nominee? The GOP electors would go 1796 on her if that happened, and select another GOP candidate she can't touch -- and that could be anyone: Rand Paul, Duncan Hunter, you name 'em, it'd be absolutely wide-open at this point because it'd be the Electors, not convention delegates, who'd be selecting the President at that point. We'd get a total faceful of Originalism, and screw the GOP-E!