I never use a swivel. My thoughts are the manufacturer builds the lure to run a certain way and the swivel would alter that. It doesn’t take long to tie the knot. I have probably tied a million fishing knots in my life!
are you talking about something like the Norman speed clip that allows you to change lures without retrying? I just tie straight to the split ring on the crankbait but I have seen that some pros, one or 2 anyway, say they use them because they say it allows for more action and lets the bait dive a little deeper that tying directly to the split ring