Making a simple animated template for frequent slight changes
I would take a learning from templates on videohive. Pre-comp all the text layers and put them in a separate organized folder in the project. This way if they have to edit the after effects file its just a matter of changing the text in the precomped layers. With that being said, I guarantee that you will never have on a week to week basis the same size text layer as there are always more or less characters per word .etc. So you might have to implement some expressions to make boxes increase in height with regards to the text layer.

If you put your text layers in a bounding box this fixes the horizontal width issue, but the height length will have to be figured out.

That being said, once its setup, I know that AE CC 2015 when imported into PP CC 2015 allows for users to edit the text from AE inside of PP which is quite useful in your situation where the users may not have that much AE knowledge.