You're Correct!

When swinging the driver less than full power, you as a golfer will have to develop a feel that works for you with this. This is because every golfer swings at a different speed, and you do not want to start swinging a lot slower as you will lose a lot of distance and distance is one of the main reasons to hit the driver.

You need to develop a speed which is slightly less than your normal swing speed with a driver. This will help you to develop a go to shot which can be used when you are faced with a very narrow hole where you must find the fairway.

By swinging your driver with slightly less than full power, you will be able to hit a straighter shot a lot easier than a driver which is swung at full power. This is because firstly you have more control over what the club is doing. And secondly, when you swing slower, the ball speed will be slower and therefore will not travel as far. If the ball doesnt travel as far it has less time to curve off line. Reduced distance is a small price to pay when you can save a lot of shots on a hole where you cannot miss the fairway.

When swinging your driver you should not feel like you are hitting it as fast as you can. This will produce shots where you are not in control of the golf club. You will therefore be more likely to hit off centred strikes and wayward shots.

This is false as when you slow down your swing speed the ball speed will also be slower and therefore the ball will not travel as far. If you are trying to shape the ball, you will be able to get more curvature on a ball that is travelling over a longer distance.

If you slowed your swing down you would actually be able to control the ball flight easier as you have more control over the golf club. This will result in a straighter, more accurate golf shot, which is less likely to drift off line.