Oh, I agree that there will ALWAYS be hanger queens. Some planes that were quite good historically won't be good because the MA environment is just to different from what they were designed for (the Ta-152 would be a good example if it had been mass produced).
For the masses here, I actually agree with Jab. It really stinks to limit anyones choice for any reason. I think that a seperate MA with a rolling planeset is a good idea, I'm just not sure that AH has the population to support it (or rather, I'm not sure enough people in AH support the idea of a RPS to open a second MA just for that reason). He is also right about another thing- there will ALWAYS be a 'uber' plane, no matter what the time period is. Depending on where the RPS is, you will see a LOT of different planes. For instance, 1939 to 1940 will see 109E's and Spits, to the exclusion of just about everything else, because they really were the best planes of that era. 1941-42 would probably see a lot of 190A use, because it was THE dominant plane during that time. I'd say 1943-44 would probably be the most 'diverse' time of all, with a lot of the planes in the MA being popular during this time (N1K, P51D,La-7,Tiffie).. and of course 1945 would be the week of the 262.
Even an RPS won't really solve the problem of 'diversity' in the MA. The only person who can enforce any kind of diversity is YOU, by flying a plane that is somewhat uncommon, even if it isnt the 'best' plane available. You have a choice to make. Your first option is to min-max, and go for the plane that offers you the most advantages with the fewest disadvantages.. or you can be an individual and pick a plane, and deal with your choice. (by the way, the YOU refers to anyone reading this, not anyone in particular).