The reasoning I got straight from Jack was different, it's not principally risk reward, but rather the novice player. "We tried the “action” buttons and nobody used them - or knew what they were."
I say let them learn by having controls in parallel. I trust pinball players to improve, I've seen many do it in a single game.
Looking at it as a risk/reward maneuver seems silly to me, somewhat like patting my head and rubbing my stomach at the same time. Can I do it, yes. Do I want to do it while I intensely play pinball? I don't get the appeal, I'm trying to play pinball, not Simon.
I respectfully disagree with Keith, that said, it's his game to design. I just don't think a player controlled diverter can improve game flow if one has to do acrobatics to activate it..
Also, I'm still looking for the reasons to stay in. What was changed was a VERY good effort for the time in which it was done, I fully applaud it, but I'm still not completely WOW'd, and I need to be for 7500(+400 extra in decal upgrades). I'm desperately worried about gameplay with all the drops and all the wide open long shots in the widebody form factor. In the Expo videos, it somewhat reminded me of some of the early SS widebodies with lots of drops and super long shots. Will it play differently (faster) than the Expo videos, I sure hope so. Still waiting on good video from IAAPA before I have to decide.