No…a duo loc snap on the blades (a swivel will foul the blade unmercilessly)
Direct line tie on jigs (always) for me…I have fished several times with either clients or friends in my boat using snap swivels while pitching jigs and, invariably, they caught considerably less fish than those of us direct tying. The snapswivel also collects more debris when pitching the river than direct tie and adds weight to make the jig dive/sink faster while working it…not good.
I change jig colors very little during a day of pitching on the river…I change my plastic color more. The water clarity does not change very fast.