An official review team would solve the problems of smurfs and people trying to be nice ("I quite like it, that's a 4.6, don't worry about the bugs, everyone makes mistakes and it was quite good for your first scenario..."), but it would create some other problems:
The amount of work. How would this team handle everything that's uploaded and offered for review? An official team would not only gain the right, but also the RESPONSIBILITY to review. Are there enough people willing to take that kind of responsibility?
The scope of the reviewers. Speaking from my own point of view: For everyone here trying to boost my ego I can produce two people who will complain about how unfair and harsh my reviews are, how I didn't appreciate their hard work or the fact that it was their first scenario. Right now we have dozens, even hundreds of potential reviewers, and they all have a different view on things. How will a team of four, six, ten (?) people achieve this kind of versatility? The 'public voice' needs to be in there somehow.
The truck factor. Again speaking for myself: If there had been an official review team on this site when I joined I'd never have had the chance to review anything. So how do new people get into this team? And new people will be needed sooner or later because people will drop out of the team, even if no one gets run over.
Mind you, I don't think it's a bad idea. We definitely have a problem here, but we should make sure that the cure won't be worse than the disease. How did the people at AoKH solve these problems?
Btw, no matter whether we get an 'official' review team or not, what I'd like to see was some authority to (sort of) review all new reviews and immediately delete everything that's not done according to the guidelines. There is some work done here in that direction, but not enough in my mind. Which is of course easy to say when it's not me who has to do all the additional work...