Yes. He should have been a visible part of the campaign from day one. Why Rand thought that he could court a party elite that hates him, hates his family, and hates the political movement that swept him to office in the first place is beyond me.
Rand Paul has been trying to simultaneously hold onto his father's libertarian supporters, cozy up to the Republican establishment, and court voters in the party's base. In trying to do these three contradictory things at the same time, he's failed in all of them.
The establishment is lukewarm toward him, conservatives are lukewarm toward him, libertarians are lukewarm toward him. His campaign has become a lukewarm pile of disappointment and wasted potential.
The sad part about all this is that Paul was the frontrunner for the nomination and the clear favourite among conservatives before he decided to rebrand himself. All he had to do was stick to his guns and ride the wave.