The stadium will be a thing of great beauty and we'll all love it ... even your good self chucklechops.
But yea, you're right, it won't be designed by the fans and the design will have constraints of some sort which will mean that not everyone is happy. But there is, literally, no design that would make everyone happy. I understand what you're saying about the "fan involvement process", because there's a lot of truth in it in that it'll likely be a box ticking exercise. However, at the end of the day, you employ an architect, and let him get on with it. I'm sure if he comes up with something that people find grotesque then he'll be told about it soon enough, but he appears to have a fair amount of common sense, so I reckon it'll be just fine.
If we wound back time to the 1900's I'm sure there'll have been some miserable arl arses complaining about those stupid looking blue and white crosses.