Not to argue with Marc's very valid experience, but I personally liked the wall of text because it instantly told me I was getting a story campaign along with my casual gameplay; it was part of what drew me in. (I also play games like this on mute a lot of the time, so audio wouldn't do much for me personally without a visual signal/text.)
Maybe you could look into options to change the font so it's larger and easier to read if necessary for people with vision impairment? And/or have it so just one paragraph at a time appears on the screen in larger font and you click to continue.