let's look at these numbers, excluding florida.
ill:
trump: 42
kasich: 26
cruz: 22
rubio: 9
mo:
trump: 49
cruz: 32
rubio: 9
kasich: 5
nc:
trump: 40
cruz: 34
kasich: 13
rubio: 10
you can see, clearly, that dropping rubio doesn't give anybody enough support to catch trump, anywhere, in the winner-takes-all states. it will, however, give trump a roughly 5 point boost - which helps him in the remaining proportional states.
if the republican party has given up and is embracing trump? well, sure.
if this is meant to help cruz or kasich? fail.
rubio dropping only helps one person: trump.