This will be a somewhat unusually short post for the "Swing Thoughts" forum. I'd like to start it off by sharing a video done by 5SK Director of Instruction for Dallas, TX Dennis Sales.
I'll agree with Dennis in saying that sometimes golfers begin to work on things that don't really matter. I'll disagree with Dennis when he says the backswing doesn't matter at all (and to be clear, he's not saying this).
It's a matter of thinking critically about your golf swing.
I work with two golfers, a father and a son, who both have a Ray Floyd-like takeaway. They roll their arms and the club gets well inside at A2 and A3.
The son, Sean, simply steepens the club from A3 to A4 and makes a downswing that's nicely on plane. The father, Ray, attempts to steepend the club from A3 to A4, but over-corrects, and is steep from A4 to A4.5, so then he spends the remainder of the downswing tipping back, uncocking, and trying like heck to get the shaft to lay down again. He's more successful than most would be as he plays to a 9, but while Sean can play with that backswing, his dad cannot.
So in helping these two golfers get better, we simply had to ask ourselves "why?" we would change something. The answer should never be "because it looks funny." When we change a grip, we can answer the question "why?" and we can do it better than "it was too weak." That's not a results oriented answer, and if you can't give a results oriented answer, you don't know the cause.
Dennis is a very capable golfer, but you'll notice that he arrives at almost identical top of the backswing positions in the three swings in his video. To him, the backswing doesn't matter much.
To others, the backswing will matter a great deal - they'll not arrive at the same top of the backswing position with those various swings. The backswings on another golfer will result in very different A4 positions, and thus, very different downswings.
Dennis successfully proved his point to his student - a student he felt was trying to get a picture-perfect backswing when Dennis felt the student didn't need to work on his backswing as it was not the cause of any of his current issues - and everyone here can learn from that.
And that doesn't mean you get to ignore everything that happens before A4 or A5… I'd just ask that you always be able to answer "why?" and that the answer should get to the actual cause of your current problem or issue. You'll never take a golf lesson from me, Dave, James, or Mike where we ask you to do something for the heck of it.