The biggest negative of Cruz is his inability to get voters to vote for him. Solve that problem then maybe I could feel like he could win in November.
I think that Trump is a walking gaffe machine that only helps him with a limited demographic but which will undo him with the demographics of a general election including women and people of color. I do not believe that less than 40% support from a party which at most represents 40% of the people is a basis to say that Trump is a vote-getter. He is not.