First of all, nowhere has Cruz been telling conservatives what his plan is to begin with. Even his immigration plan is BS because he immediately undermines its language when he declares that mass amnesty for all 40 million illegals isn't off the table.
The superiority of Trump's plan is self-evident, even if Trump is going to allow some to return based on merit. At the very least, you know what Trump will do because he's told you. Cruz has misled you for months-- and you've insulted me for months-- by claiming he opposes amnesty and has never supported legalization, even though he did, and still does.
A lot of us see Cruz’s immigration plan as solid and common sense. Where’s the common sense in deporting millions of people (which will never be funded by Congress anyway) with the intention of expediting their way back into the country? That really doesn’t make sense.