How does playing with lightning flippers instead of normal flippers make you a better player on other pins if those pins don't also use lightning flippers?
Because it teaches flipper control. More accurately, it teaches you how to play with very little flipper control. That tiny 1/8" missing from each flipper makes the ball way harder to control. If you're doing bounce passes, post passes and cradling with normal flippers, everything changes when you get lightning flippers on Drac. Getting a ball under control with lightning flippers is much more difficult. A control player will be taken aback when they play their first lightning flipper game. It takes time to get used to them.
The other reason it helps a player is because Drac doesn't allow post passes. Because of where the lower sling posts are located, it's not possible. So even if you manage to get control of the ball with the shrimpy flippers, you can't pass it over to the other side. These two things combined discourage controlled play. If you want to score big on Drac, you need to keep things moving. Drac, with it's short flippers, teaches a player how to play on the fly. Whether he likes it or not.
The other very cool thing about Drac is how it makes you go for it all. Once you get a feel for it, stacking any less than 3 multiballs is bad. Amazingly, with only the initial release of the software, they pretty much nailed it. The scoring is fairly well balanced and encourages stacking in a big way. If you want crack 1B, you're going to need at least one triple stack.
For those having trouble with the outlanes, adjust them. Both sides have 3 settings. On my game, the left side is in the middle and the right side is all the way open. Making your game steeper can also help keep balls out of the outlanes. I find my game much more fun with it really steep.