Interesting article, I had no idea that something like that was in the works. They're probably holding out until the Ryan construction is finished, just because that's coincidentally when the track relocation on the RI main is scheduled to be finished as well. If they put in new platforms/canopies for the current season, they'd have to tear them out later on (and they might not even be able to put in an outbound platform at all, because that's where the new tracks are going).
And as far as needing an architecht, every building needs one whether it's utilitarian or posh. I do think that Metra would be wise to put in a nicer-than-usual station at this location, since it will probably be the only "representation" Metra gets for themselves with a lot of the potential riders going to the games. A crudely-built station doesn't reflect well on the agency, and people riding it for leisure might be less inclined to do so for work.