Thing one: well done there, smearing several members of our board with that whitewash.
Thing two: You still haven't answered the question "what would you have the contestants do differently?" If Let's Make a Deal/Treasure Hunt levels of emotion is a ten, how much do you want the contestants to emote? If that's not what you want, please be as specific as humanly possible in answering the question put to you.
I would hope that any members who've appeared on WoF figured I'm writing in a very broad sense as a TV viewer who knows none of them personally. If any feel smeared, my sincere apologies. I envy you.
On the scale you suggest, I'd put current WoF contestants at about a three. Let's bump them to 7 and see how it works.
It's not strictly enthusiasm level, though. On the original WWTBAM, Regis was dealing largely with culled but randomly selected people from the phone. That was more interesting to me. They weren't kooks, but it was more natural, and Regis, to his credit, drew them out.
Maybe Wheel promotes a week where they get contestants that way, maybe a local contest when they're on the road, say, in NYC. You play an online game well enough, you go into a drawing to win tickets. Win that, you show up, and they either pick from the crowd at random or screen them like TPIR. They get called onto the stage five minutes before cameras roll, set up the apple crates, let them spin a couple of times, then see what happens.
Either that, or make changes to the show that actually add excitement. Yes, it's a pleasant show, but even Concentration, a pleasant show with organ music for heavens' sake, occasionally put winners in a glass box to lunge at paper money. It doesn't have to involve screwing over (or screwing) the other contestants, but this pleasant show is now runner up to
Family Feud, and the host and hostess look older and more bored than ever.