leader with yo-zuri

I've a couple questions related to the OP's topic...

Do you tie directly to the the lure's split ring or do you put a swivel on the split ring?
I've seen it done both ways and wondered which was more popular.

The Figure Eight can create a loop end like a Rapala knot, no?
Do you utilize this loop for more action with lures and live bait movement?

Using a swivel snap is only necessary if you wish to quickly change between lures. Works just fine snapping to the lure. Just keep an eye on it and make sure the snap bar isn't loose before you cast, 'cause you'll sling that lure off in a heartbeat.