The main impetus behind the 'dominant tackle' rule was to encourage really big Martin Lang-type charges into the defence. What this promoted was that any guy with an ounce of courage could bring him down, just squat in front of his legs, and you'd bring him down.
Then all and sundry would jump on top and hold him down until the defence got back 10 metres.
What this meant was that a guy who dragged a bunch of defenders 15 metres, or some guy who was brought down around the ankle would get up immediately, as the defender has to roll off, and hence give a quick play the ball.
Which is really beneficial as we all know.
The second, regarding one-on-one stripping is to promote offloading. If a guy tackles you low you either drop to the ground, or you remain upright with the tacklers should around your waist.
The result is you will either give a quick play the ball (discussed above) or look immediately to offload. To promote the offload as much as possible, players who have a defender around the waist can now hold the ball like a frisbee, palming it in one hand. Very insecure, but now under no threat of a second defender stripping it.
If you allowed a return to stripping, all you'd ever see would be Chris Anderson style 5 drives and a kick, with the forwards tucking the ball under the jumper and holding on with 2 hands.
The change of rule where no raking occured, this is purely a rule changed because of Bill Harrigan's ego.
I remember seeing so many games early 90's, where Ian Roberts and Benny Elias would rake the ball, the ball had been placed on the ground for at least 1.5 seconds, but as soon as they raked the ball, Harrigan would blow a penalty.
Then with SL, he became the technical advisor and wrote the book.
I'd like to see at the very least a tap forward if no makrer rule returned.