There is a size difference in the books when using controller that can ruin the impact and reading experience. The game was clearly modeled with KB/Mouse in mind.
It ruins formatting when sometimes that is important.
Example:
EDIT: If someone doesn't want to do it, they can point me towards a how and I can give it a go. I've been known to flail in the dark and make things happen sometimes but I haven't touched an addon in a while and even then I was very much learning.