The JV method looks to me like a drill I have done call the "Pre-set Weight" drill. It works to get you to shift your weight forward during the downswing. I did this a few years ago when I had that issue. But I do recall that it really limited the length of the backswing and the rotation of the hips. It also was uncomfortable to do for very long. I cannot see making it my normal swing.
It was a good drill for that one issue and I don't have weight forward issues anymore. In fact, I almost have too much weight going forward. My swing path became very in to out and hooks were common.
You need to rotate your hips and torso to get your arms moving faster and get your path in the right place. They all work in unison. Working independently can create other issues.. I am working on that now with my instructor.
If you have flexibility limitations, a shorter backswing can really help. Players like Tony Finau and John Rahm have short backswings generate a ton of power.
So a co-worker of mine got a new job, and Friday was his last day. I was bummed to see him go because he was the only person at work as crazy about Golf as I was (he was about a 10 handicap) and fun to talk to about the game. He is in his late 50s and is well traveled in the game of golf. He has played just about every big name course public or private except Augusta. Anyway he brought me a parting gift...a Pine Valley golf bag!! He played there in 2013 (had some great on course pictures). I have found my new walking bag:)
Not sure there is a real good pattern to judge by. I walk most of the time, so this is sort of anecdotal at best.
Some of the best rounds I've ever played are the few times I've got a cart and nobody in front of me. I'm just zipping through the joint. Normally, I'm completely alone when this happens. Maybe it just gives me the ability to not overthink too much and focus on hitting the next shot.
However, if the going is slow, some of the worst rounds I've every played have been in a cart. While waiting, I'll drape my legs over the dashboard. It will be too hard to resist getting beer from the cart girls. Bad holes tend to linger the longer you don't move. At least walking, I'm still moving a bit and the beer will wait until the end of the round.