As I said, we will agree to disagree. I can see Paul adding something to the ticket that will help Trump with various constituencies. Specifically, I am thinking of the young voters who are attracted to Bernie. They would be receptive to Rand Paul's ideas on restricting government from invading our privacy.
I could see identifying a flag rank military officer. Then there are the token candidates using race or ethnicity as a filter. Not a fan of that, but a possibility.
Trump is acceptable to many of the crazed Bernie supporters, so Rand adds NOTHING.
And there are enough voters like me, who loathe the Pauls, for that to be a damned drag.