I can only guess here, but I assume that the reduced resolution when exporting storyboards is a conscious decision. A storyboard is not a work of art; by definition, it serves to plan the progression/sequence of a film in advance. This does not require a storyboard with HD scene rendering; it is sufficient if the output size can be freely selected so that large amounts of text or additional sketches can be added, and it is sufficient if the rendering allows the scene to be recognized and assigned, which I consider to be a given.
And yes, I fully understand that you, and at least one other user, see this differently. Could it be that this is just your aesthetic discomfort with the lower resolution and pixelated display? For a normal storyboard, I can’t see the purpose behind it.
For this reason, I consider your assumption that additional code is required here to be correct. If you can find someone who is willing to develop something like this for you, you could possibly suggest to that person that they implement your requirements as well.
On the other hand, this may no longer be necessary, at least if you are/could be satisfied with the capabilities of the “Project Pages” plugin from @EyeOdin.
You can find out more about it here:
Michelist