I would be that crazy person, and I do think that Reigns has lost a lot of fan support. I am a fan, but even I'm pissed at the way he's been booked, and don't think he's ready to main event the biggest show of the year. Obviously I'm not the only one, you just have to listen to the crowd to see that.
When Reigns was a member of the Shield he was getting a solid 10 in reaction from the fans. Since the breakup and we can see that a lot was hidden, some have moved on. He is no way near as over as he was back in the Shield days. The reaction of the crowd at the Rumble should have been a wake up call. Factor in the Rock having to be called in to help save Reigns, and now this ridiculous feud with Bryan. Reigns was over, then wasn't and now they're doing everything they can to get the magic back.
And the reason I have Rollins a 10 on the mic and Ambrose an 9, is mainly because of the length of time Rollins is able to get air time. He gets much more than Ambrose does, being a member of the Authority and all. I'm sure if Ambrose as you say wasn't as scripted as he is, and got the time Rollins did, they would be even. Although getting a 9 out of 10 on mic skills is pretty good, considering how much Reigns sucks on the stick.
Well, for the Rollins-Ambrose part we agree the way you place it but for Reigns, the reaction, meaning both cheer and boos surely matches, or almost matches his Shield days. People care about him, whether it is in a bad or a good way, so he is relevant that he reaches almost ten for me, of how over he is with the fans. He's white hot right now, hotter than ever. He's the guy that everybody is talking about. Kinda like Cena where he gets these mixed reactions but is always over as hell.