It seems to me that if they finish the storefronts before the expansions is actually ready to open the photo ops would build more hype and excitement for that area. I guess with the space that is available they wouldn't want a lot of people stopping at taking pictures, maybe when they are able to move the walls out more and when it is closer to open.
I remember Quick-E-Mart opened a while before The Simpsons ride, and everyone wanted picks in front of it, they were all over the place.
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Looking at the layouts, I think the interior of Krusty Burger may come out to be quite awkward. Like basically just a hall to the back, some seats on the right side and maybe a Coke Freestyle refilling station on the left? It just looks like the interior left side would be some weird triangle that would be difficult to make useful.
Then with Android, around the side is there going to be a wall or just be open to the bathrooms? That would not look to good if it was just a store "front" and no side where there is obviously no space, a 2-D store.