Quoted from PACMAN:Please enlighten me then since you know so much. What I read was that Keith was saying he's working on something but wouldn't say or couldn't say what it was.
It isn't that I know so much, it is that I've played a lot of pinball over the years, and questions like this are always answered in one of three ways:
A mech is useful because that is the only way to do something. For instance the third flipper on Tron. The only way to hit the side ramp to the left flipper is with the third flipper. It was physically designed that way. Some say Gem as well, but Gem can't be hit from anywhere
Then we have a mech that can be used, but isn't required. I'll use WOZ here. The only thing the upper right flipper hits directly is the target in the haunted forest. Everything else can be hit by the other two flippers. So it is sort of tacked on. However, Keith (being Keith), made it an integral part of the game through software. And he did it over time. At first the BALL skill shot could be hit from anywhere (very lucrative shot), but now it can only be hit from the upper right (very dangerous). You can't melt the witch from any other flipper. He not only made it mean a lot, but it is part of the game.
And the third mech would be one that is tacked on, and programmed by a "lesser" programmer.
And this is where we hit the meat of this argument. If you take away the software, all of the mechs in a game become redundant and meaningless. Every shot is boring. Just shut off the sound, lights and scoring display and play a few games. The shots that are amazing in the game are meh. I don't care how good the game or the art are, it stinks.
As I recall, Keith said that the purpose of that flipper was to hit things (you can look up the exact quote yourself if you're interested). And that was a perfect explanation of it in my opinion. It fit in with the way he seems to do things. He doesn't seem to like to give exact explanations, and instead he tells a story and let's you explore that story. In his better games, it can feel like you just played the movie the game is based on.
I am very confident from the playing I have done on Hobbit that the flipper will have some use for a shot that is timed, and can only be hit from there. Some may consider that forced, and others may revel in both the excitement and pain of what that shot does (or doesn't do when you miss). Did you ever miss the witch shot on WOZ? Because then you have to trap the second ball and do the sequence again. And the whole time you tense up more and more because of the music, the lights, and knowing what happens when you use that upper right flipper to make the shot.
I'm sure it will all be more clear after the game is out a bit longer and people start getting deeper into the game. That isn't inside knowledge of anything except the knowledge of how games are programmed to make them great to play. And it has been part of pinball for a long time. From the clacking reward of earning a special to the most modern super jackpot callout.