Few thoughts on your driver:
1. Sometimes clubs (particularly driver) will go "dead." Crack in the face, dent in the crown or sole, both take tension off the face leaving a dead feel even with a perfectly struck ball. Also a crack or loose shaft can cause a loss of distance.
2. What are the specs of your driver? Loft, shaft flex, kick point, and weight can all effect performance. Also when you hit a good shot with your driver, what is the ball flight like? Low and hot with lots of roll generally means too low of loft, but high and no roll generally is a swing flaw.
3. Many players are going to a shorter shaft in their driver for more control, at a loss of distance. How long is your driver shaft? Is it longer or shorter than your 3 wood?
Also curious about how you measured your swing speed at home?
Is 220 yards with your 7 iron a typo? While not unheard of it is not common for anyone other than pros to hit a 7 iron over 200 yards.
Yeah completely different feel and the arms start definitely after hips and torso. From there if you exchange picking up the ball from turf/ hit it thin, with compression then it gets interesting and the feel changes even more.
Interesting swing feel. I too have been working on starting the downswing with just my torso and shoulders turning. If my arms start the downswing, they can get ahead of the torso and the club head gets ahead of my hands.
This year I has drop 5 shot in my handicap. Just one thing it killing my game.
It is the lack of belief swinging on plane. Hands eyes coordination save me from embarrassing situation but if I could apply the outward part of the three-dimensional components of the downswing everything would be so relax and enjoyable.
From P6 I never complete the down and out part properly and get a solid P7 like a solid golfer.
Target line is a witch