Quoted from Rarehero:
False equivalency. Tron’s disc is at the top of the playfield. The player shoots it on purpose. When the ball comes down, you can react. You also have a normal gap. Manga sling is right by the flippers, stops the ball dead center in the middle of the huge gap, and just drains. It’s a bullshit, poorly conceived feature. Clear example of “wouldn’t this be cool?” vs. “would this be functional or fun?”
Frankly most of his games were poorly conceived, he only got lucky 3 times, Creech, Congo and Dredd.