Keep it simple...
I tie a Uni Knot directly to the tow point eye on most stickbaits, the direct connection can influence the way the lure swims...I double the leader through the eye also before tying the Uni.
I sometimes use swivels on my poppers, Uni to swivel, split to lure... I seldom use swivel/split connections now but it comes in handy if you are changing lures a lot, saves shortening the leader with every lure change.
I only use swivels for a in-line connection on my shore casting rods, but these are running mono. I don't experience line twist with braided lines hence the reason I don't see any benefit from running a swivel at the lure connection, I just can't picture my braid/leader staying stationary allowing the swivel to swivel??
Can anyone enlighten me?